./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/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 ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:29:21,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:29:21,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:29:21,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:29:21,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:29:21,611 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:29:21,612 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:29:21,612 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:29:21,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:29:21,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:29:21,613 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:29:21,613 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:29:21,613 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:29:21,613 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:29:21,613 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:29:21,614 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:29:21,614 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:29:21,614 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:29:21,614 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:29:21,614 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:29:21,615 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:29:21,615 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:29:21,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:29:21,615 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:29:21,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:29:21,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:29:21,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:29:21,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:29:21,616 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:29:21,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:29:21,617 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:29:21,617 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:29:21,617 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:29:21,617 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:29:21,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:29:21,618 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:29:21,618 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:29:21,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:29:21,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:29:21,619 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:29:21,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:29:21,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:29:21,619 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:29:21,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:29:21,619 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:29:21,620 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:29:21,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:29:21,620 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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/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 -> ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 [2024-11-14 05:29:21,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:29:22,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:29:22,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:29:22,010 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:29:22,010 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:29:22,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c Unable to find full path for "g++" [2024-11-14 05:29:24,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:29:24,961 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:29:24,966 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2024-11-14 05:29:24,991 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/data/5bf0de469/0bb0dc0758ef4e71a1d12ce9157c5ac3/FLAG9e99f41c5 [2024-11-14 05:29:25,085 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/data/5bf0de469/0bb0dc0758ef4e71a1d12ce9157c5ac3 [2024-11-14 05:29:25,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:29:25,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:29:25,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:29:25,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:29:25,100 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:29:25,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4b71a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25, skipping insertion in model container [2024-11-14 05:29:25,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,182 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:29:25,393 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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2024-11-14 05:29:25,498 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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2024-11-14 05:29:25,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:29:25,645 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:29:25,659 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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[914,927] [2024-11-14 05:29:25,683 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_81cd5008-5e42-4c54-b87d-3baa18f7bddb/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c[7115,7128] [2024-11-14 05:29:25,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:29:25,787 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:29:25,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25 WrapperNode [2024-11-14 05:29:25,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:29:25,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:29:25,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:29:25,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:29:25,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,878 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 996 [2024-11-14 05:29:25,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:29:25,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:29:25,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:29:25,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:29:25,888 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,930 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:25,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:29:25,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:29:25,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:29:25,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:29:25,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (1/1) ... [2024-11-14 05:29:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:29:26,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:26,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:29:26,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:29:26,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:29:26,077 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 05:29:26,077 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 05:29:26,077 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 05:29:26,077 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 05:29:26,077 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 05:29:26,078 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 05:29:26,078 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 05:29:26,078 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 05:29:26,078 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 05:29:26,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 05:29:26,078 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 05:29:26,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 05:29:26,079 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 05:29:26,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 05:29:26,079 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 05:29:26,079 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 05:29:26,079 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 05:29:26,079 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 05:29:26,079 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 05:29:26,080 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 05:29:26,080 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 05:29:26,080 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 05:29:26,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:29:26,080 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 05:29:26,080 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 05:29:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 05:29:26,081 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 05:29:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:29:26,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:29:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 05:29:26,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 05:29:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 05:29:26,082 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 05:29:26,292 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:29:26,295 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:29:28,017 INFO L? ?]: Removed 125 outVars from TransFormulas that were not future-live. [2024-11-14 05:29:28,017 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:29:29,015 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:29:29,016 INFO L316 CfgBuilder]: Removed 18 assume(true) statements. [2024-11-14 05:29:29,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:29:29 BoogieIcfgContainer [2024-11-14 05:29:29,019 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:29:29,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:29:29,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:29:29,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:29:29,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:29:25" (1/3) ... [2024-11-14 05:29:29,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca31cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:29:29, skipping insertion in model container [2024-11-14 05:29:29,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:29:25" (2/3) ... [2024-11-14 05:29:29,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca31cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:29:29, skipping insertion in model container [2024-11-14 05:29:29,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:29:29" (3/3) ... [2024-11-14 05:29:29,034 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2024-11-14 05:29:29,059 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:29:29,063 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.11.cil-1.c that has 16 procedures, 267 locations, 1 initial locations, 18 loop locations, and 2 error locations. [2024-11-14 05:29:29,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:29:29,191 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;@17ebdbe0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:29:29,192 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 05:29:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 208 states have (on average 1.5144230769230769) internal successors, (315), 216 states have internal predecessors, (315), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-14 05:29:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 05:29:29,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:29,216 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 05:29:29,216 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:29,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:29,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1766886110, now seen corresponding path program 1 times [2024-11-14 05:29:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647748185] [2024-11-14 05:29:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:29,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:29,820 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 05:29:29,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:29,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647748185] [2024-11-14 05:29:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647748185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:29:29,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:29:29,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:29:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893021917] [2024-11-14 05:29:29,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:29:29,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:29:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:29:29,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:29:29,867 INFO L87 Difference]: Start difference. First operand has 267 states, 208 states have (on average 1.5144230769230769) internal successors, (315), 216 states have internal predecessors, (315), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) 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 05:29:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:31,736 INFO L93 Difference]: Finished difference Result 953 states and 1392 transitions. [2024-11-14 05:29:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:29:31,739 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 05:29:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:31,758 INFO L225 Difference]: With dead ends: 953 [2024-11-14 05:29:31,758 INFO L226 Difference]: Without dead ends: 672 [2024-11-14 05:29:31,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-14 05:29:31,771 INFO L432 NwaCegarLoop]: 467 mSDtfsCounter, 1026 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:31,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 1227 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 05:29:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-11-14 05:29:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 601. [2024-11-14 05:29:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 442 states have (on average 1.3574660633484164) internal successors, (600), 447 states have internal predecessors, (600), 96 states have call successors, (96), 63 states have call predecessors, (96), 61 states have return successors, (107), 92 states have call predecessors, (107), 92 states have call successors, (107) [2024-11-14 05:29:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 803 transitions. [2024-11-14 05:29:32,003 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 803 transitions. Word has length 45 [2024-11-14 05:29:32,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:32,003 INFO L471 AbstractCegarLoop]: Abstraction has 601 states and 803 transitions. [2024-11-14 05:29:32,004 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 05:29:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 803 transitions. [2024-11-14 05:29:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 05:29:32,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:32,007 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 05:29:32,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:29:32,008 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:32,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1644664672, now seen corresponding path program 1 times [2024-11-14 05:29:32,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:32,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137131148] [2024-11-14 05:29:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:32,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:32,601 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 05:29:32,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137131148] [2024-11-14 05:29:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137131148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:29:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:29:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 05:29:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104329816] [2024-11-14 05:29:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:29:32,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:29:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:29:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:29:32,607 INFO L87 Difference]: Start difference. First operand 601 states and 803 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 05:29:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:34,096 INFO L93 Difference]: Finished difference Result 1362 states and 1750 transitions. [2024-11-14 05:29:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:29:34,097 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 05:29:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:34,107 INFO L225 Difference]: With dead ends: 1362 [2024-11-14 05:29:34,107 INFO L226 Difference]: Without dead ends: 959 [2024-11-14 05:29:34,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 05:29:34,111 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 537 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:34,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 998 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:29:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-14 05:29:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 930. [2024-11-14 05:29:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 665 states have (on average 1.3097744360902255) internal successors, (871), 671 states have internal predecessors, (871), 152 states have call successors, (152), 111 states have call predecessors, (152), 111 states have return successors, (181), 149 states have call predecessors, (181), 148 states have call successors, (181) [2024-11-14 05:29:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1204 transitions. [2024-11-14 05:29:34,270 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1204 transitions. Word has length 46 [2024-11-14 05:29:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:34,272 INFO L471 AbstractCegarLoop]: Abstraction has 930 states and 1204 transitions. [2024-11-14 05:29:34,272 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 05:29:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1204 transitions. [2024-11-14 05:29:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 05:29:34,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:34,278 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 05:29:34,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:29:34,279 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:34,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -781870765, now seen corresponding path program 1 times [2024-11-14 05:29:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215537281] [2024-11-14 05:29:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:34,373 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 05:29:34,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:34,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215537281] [2024-11-14 05:29:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215537281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:29:34,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:29:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:29:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483548778] [2024-11-14 05:29:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:29:34,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:29:34,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:29:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:29:34,378 INFO L87 Difference]: Start difference. First operand 930 states and 1204 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 05:29:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:34,710 INFO L93 Difference]: Finished difference Result 1871 states and 2363 transitions. [2024-11-14 05:29:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:29:34,711 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 05:29:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:34,721 INFO L225 Difference]: With dead ends: 1871 [2024-11-14 05:29:34,722 INFO L226 Difference]: Without dead ends: 1189 [2024-11-14 05:29:34,724 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 05:29:34,725 INFO L432 NwaCegarLoop]: 326 mSDtfsCounter, 68 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:34,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 624 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:29:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-11-14 05:29:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1167. [2024-11-14 05:29:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 826 states have (on average 1.2893462469733656) internal successors, (1065), 832 states have internal predecessors, (1065), 194 states have call successors, (194), 149 states have call predecessors, (194), 145 states have return successors, (227), 187 states have call predecessors, (227), 190 states have call successors, (227) [2024-11-14 05:29:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1486 transitions. [2024-11-14 05:29:34,889 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1486 transitions. Word has length 47 [2024-11-14 05:29:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:34,890 INFO L471 AbstractCegarLoop]: Abstraction has 1167 states and 1486 transitions. [2024-11-14 05:29:34,890 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 05:29:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1486 transitions. [2024-11-14 05:29:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:29:34,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:34,896 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:34,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:29:34,896 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:34,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash -148601690, now seen corresponding path program 1 times [2024-11-14 05:29:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:34,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100674528] [2024-11-14 05:29:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:34,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:29:34,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:34,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100674528] [2024-11-14 05:29:34,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100674528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:29:34,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:29:34,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:29:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060518426] [2024-11-14 05:29:34,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:29:34,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:29:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:29:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:29:34,984 INFO L87 Difference]: Start difference. First operand 1167 states and 1486 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:29:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:35,276 INFO L93 Difference]: Finished difference Result 1573 states and 1976 transitions. [2024-11-14 05:29:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:29:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-11-14 05:29:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:35,284 INFO L225 Difference]: With dead ends: 1573 [2024-11-14 05:29:35,285 INFO L226 Difference]: Without dead ends: 1018 [2024-11-14 05:29:35,286 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 05:29:35,287 INFO L432 NwaCegarLoop]: 327 mSDtfsCounter, 349 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:35,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 389 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:29:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2024-11-14 05:29:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 812. [2024-11-14 05:29:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 590 states have (on average 1.2915254237288136) internal successors, (762), 595 states have internal predecessors, (762), 131 states have call successors, (131), 95 states have call predecessors, (131), 89 states have return successors, (135), 123 states have call predecessors, (135), 127 states have call successors, (135) [2024-11-14 05:29:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1028 transitions. [2024-11-14 05:29:35,380 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1028 transitions. Word has length 53 [2024-11-14 05:29:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:35,381 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 1028 transitions. [2024-11-14 05:29:35,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:29:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1028 transitions. [2024-11-14 05:29:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:29:35,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:35,383 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:35,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 05:29:35,386 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:35,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash -366910339, now seen corresponding path program 1 times [2024-11-14 05:29:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:35,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234219308] [2024-11-14 05:29:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:35,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:35,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:35,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234219308] [2024-11-14 05:29:35,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234219308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:29:35,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:29:35,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:29:35,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443184635] [2024-11-14 05:29:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:29:35,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:29:35,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:29:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:29:35,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:29:35,603 INFO L87 Difference]: Start difference. First operand 812 states and 1028 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 05:29:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:29:36,136 INFO L93 Difference]: Finished difference Result 1067 states and 1329 transitions. [2024-11-14 05:29:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:29:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2024-11-14 05:29:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:29:36,146 INFO L225 Difference]: With dead ends: 1067 [2024-11-14 05:29:36,146 INFO L226 Difference]: Without dead ends: 1064 [2024-11-14 05:29:36,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:29:36,148 INFO L432 NwaCegarLoop]: 322 mSDtfsCounter, 637 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:29:36,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 365 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:29:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2024-11-14 05:29:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 811. [2024-11-14 05:29:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 590 states have (on average 1.2813559322033898) internal successors, (756), 594 states have internal predecessors, (756), 130 states have call successors, (130), 95 states have call predecessors, (130), 89 states have return successors, (135), 123 states have call predecessors, (135), 127 states have call successors, (135) [2024-11-14 05:29:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1021 transitions. [2024-11-14 05:29:36,255 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1021 transitions. Word has length 54 [2024-11-14 05:29:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:29:36,256 INFO L471 AbstractCegarLoop]: Abstraction has 811 states and 1021 transitions. [2024-11-14 05:29:36,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-14 05:29:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1021 transitions. [2024-11-14 05:29:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:29:36,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:29:36,258 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:29:36,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 05:29:36,258 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:29:36,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:29:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1509295131, now seen corresponding path program 1 times [2024-11-14 05:29:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:29:36,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550860441] [2024-11-14 05:29:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:29:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:36,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:29:36,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550860441] [2024-11-14 05:29:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550860441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:29:36,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884614874] [2024-11-14 05:29:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:29:36,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:29:36,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:29:36,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:29:36,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:29:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:29:36,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:29:36,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:29:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:37,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:29:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:29:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884614874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:29:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437410542] [2024-11-14 05:29:37,401 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 05:29:37,401 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:29:37,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:29:37,411 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:29:37,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:29:46,203 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2024-11-14 05:29:46,295 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 197 for LOIs [2024-11-14 05:29:46,375 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 205 for LOIs [2024-11-14 05:29:47,680 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 201 for LOIs [2024-11-14 05:29:47,934 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 201 for LOIs [2024-11-14 05:29:48,423 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 201 for LOIs [2024-11-14 05:29:48,537 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 208 for LOIs [2024-11-14 05:29:48,622 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:30:18,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [437410542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:30:18,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:30:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 05:30:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576527995] [2024-11-14 05:30:18,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:30:18,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:30:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:18,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:30:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 05:30:18,261 INFO L87 Difference]: Start difference. First operand 811 states and 1021 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:30:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:43,287 INFO L93 Difference]: Finished difference Result 1450 states and 1777 transitions. [2024-11-14 05:30:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 05:30:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-14 05:30:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:43,297 INFO L225 Difference]: With dead ends: 1450 [2024-11-14 05:30:43,299 INFO L226 Difference]: Without dead ends: 837 [2024-11-14 05:30:43,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:30:43,304 INFO L432 NwaCegarLoop]: 302 mSDtfsCounter, 170 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 3873 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 4017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:43,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 2241 Invalid, 4017 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [144 Valid, 3873 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-11-14 05:30:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2024-11-14 05:30:43,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 829. [2024-11-14 05:30:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 606 states have (on average 1.2772277227722773) internal successors, (774), 610 states have internal predecessors, (774), 131 states have call successors, (131), 96 states have call predecessors, (131), 90 states have return successors, (136), 124 states have call predecessors, (136), 128 states have call successors, (136) [2024-11-14 05:30:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1041 transitions. [2024-11-14 05:30:43,448 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1041 transitions. Word has length 55 [2024-11-14 05:30:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:43,448 INFO L471 AbstractCegarLoop]: Abstraction has 829 states and 1041 transitions. [2024-11-14 05:30:43,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-14 05:30:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1041 transitions. [2024-11-14 05:30:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 05:30:43,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:43,450 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:43,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:30:43,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 05:30:43,651 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:30:43,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1842371862, now seen corresponding path program 1 times [2024-11-14 05:30:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:43,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668739375] [2024-11-14 05:30:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:30:43,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:43,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668739375] [2024-11-14 05:30:43,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668739375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:30:43,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:30:43,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:30:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017931148] [2024-11-14 05:30:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:30:43,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:30:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:30:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:30:43,753 INFO L87 Difference]: Start difference. First operand 829 states and 1041 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:30:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:44,060 INFO L93 Difference]: Finished difference Result 1411 states and 1724 transitions. [2024-11-14 05:30:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:30:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2024-11-14 05:30:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:44,069 INFO L225 Difference]: With dead ends: 1411 [2024-11-14 05:30:44,070 INFO L226 Difference]: Without dead ends: 1038 [2024-11-14 05:30:44,072 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 05:30:44,074 INFO L432 NwaCegarLoop]: 348 mSDtfsCounter, 43 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:44,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 660 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:30:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2024-11-14 05:30:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 950. [2024-11-14 05:30:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 687 states have (on average 1.262008733624454) internal successors, (867), 695 states have internal predecessors, (867), 153 states have call successors, (153), 118 states have call predecessors, (153), 108 states have return successors, (158), 138 states have call predecessors, (158), 150 states have call successors, (158) [2024-11-14 05:30:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1178 transitions. [2024-11-14 05:30:44,255 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1178 transitions. Word has length 61 [2024-11-14 05:30:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:44,257 INFO L471 AbstractCegarLoop]: Abstraction has 950 states and 1178 transitions. [2024-11-14 05:30:44,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:30:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1178 transitions. [2024-11-14 05:30:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 05:30:44,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:44,261 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] [2024-11-14 05:30:44,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 05:30:44,262 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:30:44,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash 941596400, now seen corresponding path program 1 times [2024-11-14 05:30:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:44,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940588486] [2024-11-14 05:30:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:44,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:44,508 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 05:30:44,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940588486] [2024-11-14 05:30:44,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940588486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:30:44,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:30:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:30:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909317408] [2024-11-14 05:30:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:30:44,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:30:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:30:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:30:44,513 INFO L87 Difference]: Start difference. First operand 950 states and 1178 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 05:30:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:45,824 INFO L93 Difference]: Finished difference Result 1843 states and 2616 transitions. [2024-11-14 05:30:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:30:45,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 65 [2024-11-14 05:30:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:45,837 INFO L225 Difference]: With dead ends: 1843 [2024-11-14 05:30:45,837 INFO L226 Difference]: Without dead ends: 1656 [2024-11-14 05:30:45,839 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 05:30:45,840 INFO L432 NwaCegarLoop]: 527 mSDtfsCounter, 1426 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:45,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 1375 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:30:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2024-11-14 05:30:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1643. [2024-11-14 05:30:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1275 states have (on average 1.363921568627451) internal successors, (1739), 1286 states have internal predecessors, (1739), 234 states have call successors, (234), 142 states have call predecessors, (234), 132 states have return successors, (297), 216 states have call predecessors, (297), 231 states have call successors, (297) [2024-11-14 05:30:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2270 transitions. [2024-11-14 05:30:46,127 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2270 transitions. Word has length 65 [2024-11-14 05:30:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:46,127 INFO L471 AbstractCegarLoop]: Abstraction has 1643 states and 2270 transitions. [2024-11-14 05:30:46,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 05:30:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2270 transitions. [2024-11-14 05:30:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:30:46,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:46,132 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:46,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:30:46,132 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:30:46,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 566699168, now seen corresponding path program 1 times [2024-11-14 05:30:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097499692] [2024-11-14 05:30:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:46,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 05:30:46,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:46,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097499692] [2024-11-14 05:30:46,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097499692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:30:46,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075539052] [2024-11-14 05:30:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:46,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:46,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:30:46,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:30:46,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:30:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:46,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:30:46,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:30:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:30:46,982 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:30:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075539052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:30:46,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:30:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 05:30:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104594624] [2024-11-14 05:30:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:30:46,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:30:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:30:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:30:46,985 INFO L87 Difference]: Start difference. First operand 1643 states and 2270 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:30:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:47,611 INFO L93 Difference]: Finished difference Result 2190 states and 2921 transitions. [2024-11-14 05:30:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:30:47,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-14 05:30:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:47,622 INFO L225 Difference]: With dead ends: 2190 [2024-11-14 05:30:47,622 INFO L226 Difference]: Without dead ends: 1438 [2024-11-14 05:30:47,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-14 05:30:47,628 INFO L432 NwaCegarLoop]: 329 mSDtfsCounter, 305 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:47,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1255 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:30:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2024-11-14 05:30:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1415. [2024-11-14 05:30:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1133 states have (on average 1.3901147396293028) internal successors, (1575), 1142 states have internal predecessors, (1575), 186 states have call successors, (186), 100 states have call predecessors, (186), 94 states have return successors, (245), 174 states have call predecessors, (245), 183 states have call successors, (245) [2024-11-14 05:30:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2006 transitions. [2024-11-14 05:30:47,847 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2006 transitions. Word has length 102 [2024-11-14 05:30:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:47,849 INFO L471 AbstractCegarLoop]: Abstraction has 1415 states and 2006 transitions. [2024-11-14 05:30:47,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:30:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2006 transitions. [2024-11-14 05:30:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 05:30:47,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:47,856 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:47,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:30:48,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:48,063 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:30:48,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash -122100935, now seen corresponding path program 1 times [2024-11-14 05:30:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:48,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367097573] [2024-11-14 05:30:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 05:30:48,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367097573] [2024-11-14 05:30:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367097573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:30:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399850716] [2024-11-14 05:30:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:48,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:30:48,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:30:48,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:30:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:48,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:30:48,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:30:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:30:48,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:30:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399850716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:30:48,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:30:48,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-14 05:30:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629885337] [2024-11-14 05:30:48,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:30:48,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:30:48,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:30:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:30:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:30:48,632 INFO L87 Difference]: Start difference. First operand 1415 states and 2006 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:30:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:30:48,975 INFO L93 Difference]: Finished difference Result 1714 states and 2364 transitions. [2024-11-14 05:30:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:30:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-14 05:30:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:30:48,986 INFO L225 Difference]: With dead ends: 1714 [2024-11-14 05:30:48,986 INFO L226 Difference]: Without dead ends: 1264 [2024-11-14 05:30:48,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:30:48,989 INFO L432 NwaCegarLoop]: 350 mSDtfsCounter, 53 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:30:48,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 645 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:30:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2024-11-14 05:30:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1148. [2024-11-14 05:30:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 943 states have (on average 1.423117709437964) internal successors, (1342), 950 states have internal predecessors, (1342), 144 states have call successors, (144), 61 states have call predecessors, (144), 59 states have return successors, (199), 138 states have call predecessors, (199), 141 states have call successors, (199) [2024-11-14 05:30:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1685 transitions. [2024-11-14 05:30:49,176 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1685 transitions. Word has length 104 [2024-11-14 05:30:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:30:49,176 INFO L471 AbstractCegarLoop]: Abstraction has 1148 states and 1685 transitions. [2024-11-14 05:30:49,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:30:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1685 transitions. [2024-11-14 05:30:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 05:30:49,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:30:49,180 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:30:49,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 05:30:49,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:30:49,380 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:30:49,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:30:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash -522092134, now seen corresponding path program 1 times [2024-11-14 05:30:49,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:30:49,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450854100] [2024-11-14 05:30:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:30:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 05:30:49,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:30:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450854100] [2024-11-14 05:30:49,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450854100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:30:49,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205065693] [2024-11-14 05:30:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:30:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:30:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:30:49,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:30:49,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:30:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:30:49,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:30:49,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:30:50,330 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 05:30:50,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:30:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 05:30:50,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205065693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:30:50,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578356879] [2024-11-14 05:30:50,560 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 05:30:50,563 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:30:50,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:30:50,564 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:30:50,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:31:17,111 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 239 for LOIs [2024-11-14 05:31:17,630 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 203 for LOIs [2024-11-14 05:31:18,153 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 160 for LOIs [2024-11-14 05:31:18,215 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2024-11-14 05:31:21,889 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 225 for LOIs [2024-11-14 05:31:25,306 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 174 for LOIs [2024-11-14 05:31:25,536 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 218 for LOIs [2024-11-14 05:31:26,017 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 229 for LOIs [2024-11-14 05:31:26,515 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:32:31,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38651#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~t11_i~0 0) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 05:32:31,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:32:31,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:32:31,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 05:32:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796113513] [2024-11-14 05:32:31,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:32:31,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:32:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:32:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:32:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:32:31,871 INFO L87 Difference]: Start difference. First operand 1148 states and 1685 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 05:32:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:32:36,493 INFO L93 Difference]: Finished difference Result 2088 states and 2772 transitions. [2024-11-14 05:32:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 05:32:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-14 05:32:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:32:36,505 INFO L225 Difference]: With dead ends: 2088 [2024-11-14 05:32:36,505 INFO L226 Difference]: Without dead ends: 1906 [2024-11-14 05:32:36,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 67.7s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 05:32:36,512 INFO L432 NwaCegarLoop]: 295 mSDtfsCounter, 1225 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:32:36,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 2084 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-14 05:32:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2024-11-14 05:32:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1543. [2024-11-14 05:32:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1228 states have (on average 1.3656351791530945) internal successors, (1677), 1235 states have internal predecessors, (1677), 202 states have call successors, (202), 113 states have call predecessors, (202), 111 states have return successors, (257), 196 states have call predecessors, (257), 199 states have call successors, (257) [2024-11-14 05:32:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2136 transitions. [2024-11-14 05:32:36,776 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2136 transitions. Word has length 104 [2024-11-14 05:32:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:32:36,776 INFO L471 AbstractCegarLoop]: Abstraction has 1543 states and 2136 transitions. [2024-11-14 05:32:36,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-14 05:32:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2136 transitions. [2024-11-14 05:32:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 05:32:36,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:32:36,783 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:32:36,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:32:36,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:32:36,988 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:32:36,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:32:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1850243246, now seen corresponding path program 1 times [2024-11-14 05:32:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:32:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853749668] [2024-11-14 05:32:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:32:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 05:32:37,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:32:37,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853749668] [2024-11-14 05:32:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853749668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:32:37,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:32:37,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:32:37,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279456752] [2024-11-14 05:32:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:32:37,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:32:37,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:32:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:32:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:32:37,061 INFO L87 Difference]: Start difference. First operand 1543 states and 2136 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 05:32:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:32:37,441 INFO L93 Difference]: Finished difference Result 2042 states and 2708 transitions. [2024-11-14 05:32:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:32:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-14 05:32:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:32:37,451 INFO L225 Difference]: With dead ends: 2042 [2024-11-14 05:32:37,451 INFO L226 Difference]: Without dead ends: 1533 [2024-11-14 05:32:37,453 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 05:32:37,454 INFO L432 NwaCegarLoop]: 353 mSDtfsCounter, 351 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:32:37,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 420 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:32:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2024-11-14 05:32:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1524. [2024-11-14 05:32:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1211 states have (on average 1.3583815028901733) internal successors, (1645), 1218 states have internal predecessors, (1645), 201 states have call successors, (201), 112 states have call predecessors, (201), 110 states have return successors, (256), 195 states have call predecessors, (256), 198 states have call successors, (256) [2024-11-14 05:32:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2102 transitions. [2024-11-14 05:32:37,698 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2102 transitions. Word has length 108 [2024-11-14 05:32:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:32:37,699 INFO L471 AbstractCegarLoop]: Abstraction has 1524 states and 2102 transitions. [2024-11-14 05:32:37,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 05:32:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2102 transitions. [2024-11-14 05:32:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 05:32:37,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:32:37,704 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:32:37,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 05:32:37,704 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:32:37,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:32:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -715945714, now seen corresponding path program 1 times [2024-11-14 05:32:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:32:37,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914158706] [2024-11-14 05:32:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:32:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:32:37,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:32:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914158706] [2024-11-14 05:32:37,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914158706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:32:37,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881153457] [2024-11-14 05:32:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:37,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:32:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:32:37,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:32:37,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:32:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:38,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 05:32:38,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:32:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 05:32:38,196 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:32:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881153457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:32:38,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:32:38,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 05:32:38,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949683151] [2024-11-14 05:32:38,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:32:38,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:32:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:32:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:32:38,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 05:32:38,198 INFO L87 Difference]: Start difference. First operand 1524 states and 2102 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:32:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:32:38,872 INFO L93 Difference]: Finished difference Result 2044 states and 2696 transitions. [2024-11-14 05:32:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:32:38,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-14 05:32:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:32:38,882 INFO L225 Difference]: With dead ends: 2044 [2024-11-14 05:32:38,882 INFO L226 Difference]: Without dead ends: 1495 [2024-11-14 05:32:38,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-14 05:32:38,886 INFO L432 NwaCegarLoop]: 342 mSDtfsCounter, 44 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1971 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:32:38,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1971 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:32:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2024-11-14 05:32:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1435. [2024-11-14 05:32:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1150 states have (on average 1.3695652173913044) internal successors, (1575), 1157 states have internal predecessors, (1575), 186 states have call successors, (186), 99 states have call predecessors, (186), 97 states have return successors, (241), 180 states have call predecessors, (241), 183 states have call successors, (241) [2024-11-14 05:32:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 2002 transitions. [2024-11-14 05:32:39,132 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 2002 transitions. Word has length 112 [2024-11-14 05:32:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:32:39,132 INFO L471 AbstractCegarLoop]: Abstraction has 1435 states and 2002 transitions. [2024-11-14 05:32:39,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 05:32:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 2002 transitions. [2024-11-14 05:32:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 05:32:39,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:32:39,136 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:32:39,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 05:32:39,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:32:39,339 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:32:39,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:32:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2045169364, now seen corresponding path program 1 times [2024-11-14 05:32:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:32:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923481333] [2024-11-14 05:32:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:32:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 05:32:39,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:32:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923481333] [2024-11-14 05:32:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923481333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:32:39,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:32:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:32:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351038210] [2024-11-14 05:32:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:32:39,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:32:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:32:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:32:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:32:39,528 INFO L87 Difference]: Start difference. First operand 1435 states and 2002 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 05:32:40,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:32:40,139 INFO L93 Difference]: Finished difference Result 2184 states and 2847 transitions. [2024-11-14 05:32:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:32:40,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-14 05:32:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:32:40,151 INFO L225 Difference]: With dead ends: 2184 [2024-11-14 05:32:40,151 INFO L226 Difference]: Without dead ends: 1727 [2024-11-14 05:32:40,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:32:40,153 INFO L432 NwaCegarLoop]: 347 mSDtfsCounter, 340 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:32:40,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1449 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:32:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2024-11-14 05:32:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1693. [2024-11-14 05:32:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1312 states have (on average 1.3376524390243902) internal successors, (1755), 1325 states have internal predecessors, (1755), 234 states have call successors, (234), 141 states have call predecessors, (234), 145 states have return successors, (301), 228 states have call predecessors, (301), 231 states have call successors, (301) [2024-11-14 05:32:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2290 transitions. [2024-11-14 05:32:40,457 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2290 transitions. Word has length 113 [2024-11-14 05:32:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:32:40,458 INFO L471 AbstractCegarLoop]: Abstraction has 1693 states and 2290 transitions. [2024-11-14 05:32:40,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-14 05:32:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2290 transitions. [2024-11-14 05:32:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 05:32:40,462 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:32:40,462 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:32:40,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 05:32:40,462 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:32:40,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:32:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1428670185, now seen corresponding path program 1 times [2024-11-14 05:32:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:32:40,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470964142] [2024-11-14 05:32:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:40,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:32:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:32:41,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:32:41,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470964142] [2024-11-14 05:32:41,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470964142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:32:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627884952] [2024-11-14 05:32:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:32:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:32:41,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:32:41,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:32:41,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:32:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:32:41,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:32:41,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:32:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:32:43,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:32:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 05:32:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627884952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:32:44,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153081337] [2024-11-14 05:32:44,750 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 05:32:44,750 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:32:44,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:32:44,751 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:32:44,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:33:31,572 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 250 for LOIs [2024-11-14 05:33:31,814 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 05:33:31,816 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 05:33:31,819 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 214 for LOIs [2024-11-14 05:33:33,169 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2024-11-14 05:33:34,392 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 05:33:34,417 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 208 for LOIs [2024-11-14 05:33:34,632 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2024-11-14 05:33:34,856 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:33:53,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59862#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-14 05:33:53,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:33:53,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:33:53,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 53 [2024-11-14 05:33:53,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88401903] [2024-11-14 05:33:53,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:33:53,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 05:33:53,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:33:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 05:33:53,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=9648, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 05:33:53,584 INFO L87 Difference]: Start difference. First operand 1693 states and 2290 transitions. Second operand has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 05:34:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:14,552 INFO L93 Difference]: Finished difference Result 4519 states and 5739 transitions. [2024-11-14 05:34:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2024-11-14 05:34:14,553 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) Word has length 114 [2024-11-14 05:34:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:14,571 INFO L225 Difference]: With dead ends: 4519 [2024-11-14 05:34:14,571 INFO L226 Difference]: Without dead ends: 3801 [2024-11-14 05:34:14,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 297 SyntacticMatches, 6 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 55824 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=13034, Invalid=124236, Unknown=0, NotChecked=0, Total=137270 [2024-11-14 05:34:14,599 INFO L432 NwaCegarLoop]: 298 mSDtfsCounter, 5899 mSDsluCounter, 4002 mSDsCounter, 0 mSdLazyCounter, 6647 mSolverCounterSat, 2606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5899 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 9253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2606 IncrementalHoareTripleChecker+Valid, 6647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:14,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5899 Valid, 4300 Invalid, 9253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2606 Valid, 6647 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 05:34:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2024-11-14 05:34:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 1968. [2024-11-14 05:34:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1495 states have (on average 1.31371237458194) internal successors, (1964), 1510 states have internal predecessors, (1964), 279 states have call successors, (279), 178 states have call predecessors, (279), 192 states have return successors, (358), 281 states have call predecessors, (358), 276 states have call successors, (358) [2024-11-14 05:34:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2601 transitions. [2024-11-14 05:34:15,108 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2601 transitions. Word has length 114 [2024-11-14 05:34:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:15,109 INFO L471 AbstractCegarLoop]: Abstraction has 1968 states and 2601 transitions. [2024-11-14 05:34:15,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 05:34:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2601 transitions. [2024-11-14 05:34:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 05:34:15,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:15,113 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:34:15,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:34:15,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:15,314 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:15,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash 256911727, now seen corresponding path program 1 times [2024-11-14 05:34:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640528319] [2024-11-14 05:34:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:15,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:34:15,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640528319] [2024-11-14 05:34:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640528319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955062964] [2024-11-14 05:34:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:15,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:15,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:15,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:34:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:15,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:34:15,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:34:15,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:34:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:34:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955062964] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:16,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:34:16,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 05:34:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349404110] [2024-11-14 05:34:16,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:34:16,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 05:34:16,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:34:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 05:34:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:34:16,144 INFO L87 Difference]: Start difference. First operand 1968 states and 2601 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:34:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:34:17,434 INFO L93 Difference]: Finished difference Result 3292 states and 4149 transitions. [2024-11-14 05:34:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 05:34:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-14 05:34:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:34:17,448 INFO L225 Difference]: With dead ends: 3292 [2024-11-14 05:34:17,449 INFO L226 Difference]: Without dead ends: 2301 [2024-11-14 05:34:17,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:34:17,453 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 504 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:34:17,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 765 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:34:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2024-11-14 05:34:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2048. [2024-11-14 05:34:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1540 states have (on average 1.3084415584415585) internal successors, (2015), 1558 states have internal predecessors, (2015), 298 states have call successors, (298), 187 states have call predecessors, (298), 208 states have return successors, (398), 304 states have call predecessors, (398), 295 states have call successors, (398) [2024-11-14 05:34:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 2711 transitions. [2024-11-14 05:34:17,977 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 2711 transitions. Word has length 115 [2024-11-14 05:34:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:34:17,978 INFO L471 AbstractCegarLoop]: Abstraction has 2048 states and 2711 transitions. [2024-11-14 05:34:17,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:34:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 2711 transitions. [2024-11-14 05:34:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 05:34:17,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:34:17,982 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:34:18,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 05:34:18,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 05:34:18,187 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:34:18,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:34:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 328911609, now seen corresponding path program 1 times [2024-11-14 05:34:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:34:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624984981] [2024-11-14 05:34:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:34:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 05:34:19,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:34:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624984981] [2024-11-14 05:34:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624984981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:34:19,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815692166] [2024-11-14 05:34:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:34:19,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:34:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:34:19,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:34:19,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:34:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:34:19,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 05:34:19,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:34:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:34:20,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:34:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 05:34:21,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815692166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:34:21,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306376936] [2024-11-14 05:34:21,562 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 05:34:21,562 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:34:21,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:34:21,562 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:34:21,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:34:42,285 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 253 for LOIs [2024-11-14 05:34:42,526 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 79 for LOIs [2024-11-14 05:34:42,550 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 9 for LOIs [2024-11-14 05:34:42,554 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 217 for LOIs [2024-11-14 05:34:43,964 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 218 for LOIs [2024-11-14 05:34:45,271 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 23 for LOIs [2024-11-14 05:34:45,300 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2024-11-14 05:34:45,515 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2024-11-14 05:34:45,739 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:35:06,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78869#(and (= ~q_req_up~0 1) (exists ((v_~q_req_up~0_103 Int) (v_~q_free~0_105 Int)) (and (or (exists ((v_~p_dw_st~0_142 Int) (v_~p_dw_pc~0_49 Int)) (and (or (and (= v_~p_dw_pc~0_49 0) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_72| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483648))))) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_72| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_72| 2147483648)))) (= v_~p_dw_pc~0_49 1))) (or (and (<= ~q_buf_0~0 2147483647) (= v_~p_dw_st~0_142 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~q_req_up~0_103 1)) (and (= v_~p_dw_pc~0_49 0) (= v_~p_dw_st~0_142 1))))) (= ~p_dw_st~0 0)) (or (and (<= ~p_dw_pc~0 1) (<= 0 ~p_dw_pc~0) (<= 0 v_~q_free~0_105) (<= v_~q_free~0_105 1) (= ~p_dw_st~0 0)) (and (= v_~q_free~0_105 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0))))) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_45| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 2147483647) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_45| 0)))) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 05:35:06,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:35:06,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:35:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 05:35:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726339256] [2024-11-14 05:35:06,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:35:06,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:35:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:35:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=924, Invalid=9378, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 05:35:06,230 INFO L87 Difference]: Start difference. First operand 2048 states and 2711 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 05:35:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:15,464 INFO L93 Difference]: Finished difference Result 4253 states and 5290 transitions. [2024-11-14 05:35:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-14 05:35:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 05:35:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:15,478 INFO L225 Difference]: With dead ends: 4253 [2024-11-14 05:35:15,478 INFO L226 Difference]: Without dead ends: 3182 [2024-11-14 05:35:15,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 16029 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=4250, Invalid=36756, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 05:35:15,485 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 6392 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 6098 mSolverCounterSat, 2823 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6392 SdHoareTripleChecker+Valid, 3434 SdHoareTripleChecker+Invalid, 8921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2823 IncrementalHoareTripleChecker+Valid, 6098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:15,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6392 Valid, 3434 Invalid, 8921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2823 Valid, 6098 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-14 05:35:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2024-11-14 05:35:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 1864. [2024-11-14 05:35:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1428 states have (on average 1.3214285714285714) internal successors, (1887), 1445 states have internal predecessors, (1887), 258 states have call successors, (258), 155 states have call predecessors, (258), 176 states have return successors, (348), 265 states have call predecessors, (348), 255 states have call successors, (348) [2024-11-14 05:35:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2493 transitions. [2024-11-14 05:35:15,973 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2493 transitions. Word has length 124 [2024-11-14 05:35:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:15,973 INFO L471 AbstractCegarLoop]: Abstraction has 1864 states and 2493 transitions. [2024-11-14 05:35:15,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 05:35:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2493 transitions. [2024-11-14 05:35:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 05:35:15,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:15,977 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:16,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:35:16,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:35:16,181 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:16,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1658231321, now seen corresponding path program 1 times [2024-11-14 05:35:16,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:16,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460589707] [2024-11-14 05:35:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:16,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 05:35:16,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460589707] [2024-11-14 05:35:16,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460589707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012810174] [2024-11-14 05:35:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:16,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:16,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:16,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:16,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:35:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:16,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 05:35:16,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 05:35:16,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:35:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:35:16,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012810174] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:16,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:35:16,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 05:35:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017040972] [2024-11-14 05:35:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:16,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:35:16,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:35:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 05:35:16,961 INFO L87 Difference]: Start difference. First operand 1864 states and 2493 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:35:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:18,107 INFO L93 Difference]: Finished difference Result 2519 states and 3234 transitions. [2024-11-14 05:35:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:35:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-14 05:35:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:18,115 INFO L225 Difference]: With dead ends: 2519 [2024-11-14 05:35:18,116 INFO L226 Difference]: Without dead ends: 1632 [2024-11-14 05:35:18,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:35:18,119 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 777 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:18,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 710 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:35:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2024-11-14 05:35:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1595. [2024-11-14 05:35:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1229 states have (on average 1.3360455655004069) internal successors, (1642), 1246 states have internal predecessors, (1642), 222 states have call successors, (222), 125 states have call predecessors, (222), 142 states have return successors, (307), 225 states have call predecessors, (307), 219 states have call successors, (307) [2024-11-14 05:35:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2171 transitions. [2024-11-14 05:35:18,522 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2171 transitions. Word has length 125 [2024-11-14 05:35:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:18,523 INFO L471 AbstractCegarLoop]: Abstraction has 1595 states and 2171 transitions. [2024-11-14 05:35:18,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-14 05:35:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2171 transitions. [2024-11-14 05:35:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:18,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:18,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:18,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:35:18,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:35:18,728 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:18,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash 239104058, now seen corresponding path program 1 times [2024-11-14 05:35:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:18,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235599947] [2024-11-14 05:35:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:18,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:18,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235599947] [2024-11-14 05:35:18,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235599947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:18,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198182450] [2024-11-14 05:35:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:18,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:18,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:18,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:35:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:19,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:19,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 05:35:19,162 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:19,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198182450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:19,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:19,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:19,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998466805] [2024-11-14 05:35:19,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:19,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:19,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:19,163 INFO L87 Difference]: Start difference. First operand 1595 states and 2171 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:19,761 INFO L93 Difference]: Finished difference Result 3339 states and 5006 transitions. [2024-11-14 05:35:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 131 [2024-11-14 05:35:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:19,774 INFO L225 Difference]: With dead ends: 3339 [2024-11-14 05:35:19,774 INFO L226 Difference]: Without dead ends: 2459 [2024-11-14 05:35:19,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:19,780 INFO L432 NwaCegarLoop]: 317 mSDtfsCounter, 344 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:19,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 547 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:35:19,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2024-11-14 05:35:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2450. [2024-11-14 05:35:20,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 1957 states have (on average 1.3883495145631068) internal successors, (2717), 1977 states have internal predecessors, (2717), 319 states have call successors, (319), 155 states have call predecessors, (319), 172 states have return successors, (458), 319 states have call predecessors, (458), 316 states have call successors, (458) [2024-11-14 05:35:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3494 transitions. [2024-11-14 05:35:20,250 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3494 transitions. Word has length 131 [2024-11-14 05:35:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:20,250 INFO L471 AbstractCegarLoop]: Abstraction has 2450 states and 3494 transitions. [2024-11-14 05:35:20,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3494 transitions. [2024-11-14 05:35:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:20,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:20,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:20,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:35:20,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:20,456 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:20,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -104853064, now seen corresponding path program 1 times [2024-11-14 05:35:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577228274] [2024-11-14 05:35:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:20,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577228274] [2024-11-14 05:35:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577228274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810382008] [2024-11-14 05:35:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:20,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:20,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:35:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:20,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:20,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:35:20,863 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810382008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:20,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:20,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578649897] [2024-11-14 05:35:20,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:20,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:20,865 INFO L87 Difference]: Start difference. First operand 2450 states and 3494 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:21,487 INFO L93 Difference]: Finished difference Result 5889 states and 9058 transitions. [2024-11-14 05:35:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 131 [2024-11-14 05:35:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:21,505 INFO L225 Difference]: With dead ends: 5889 [2024-11-14 05:35:21,505 INFO L226 Difference]: Without dead ends: 4154 [2024-11-14 05:35:21,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:21,515 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 347 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:21,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 542 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:35:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2024-11-14 05:35:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 4140. [2024-11-14 05:35:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3398 states have (on average 1.4234844025897586) internal successors, (4837), 3424 states have internal predecessors, (4837), 508 states have call successors, (508), 215 states have call predecessors, (508), 232 states have return successors, (751), 502 states have call predecessors, (751), 505 states have call successors, (751) [2024-11-14 05:35:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 6096 transitions. [2024-11-14 05:35:21,942 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 6096 transitions. Word has length 131 [2024-11-14 05:35:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:21,942 INFO L471 AbstractCegarLoop]: Abstraction has 4140 states and 6096 transitions. [2024-11-14 05:35:21,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 6096 transitions. [2024-11-14 05:35:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:21,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:21,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:21,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:35:22,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:22,151 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:22,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash 860493690, now seen corresponding path program 1 times [2024-11-14 05:35:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:22,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712250340] [2024-11-14 05:35:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:22,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712250340] [2024-11-14 05:35:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712250340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043324385] [2024-11-14 05:35:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:22,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:22,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:22,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:35:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:22,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:22,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:35:22,566 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:22,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043324385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:22,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938947852] [2024-11-14 05:35:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:22,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:22,567 INFO L87 Difference]: Start difference. First operand 4140 states and 6096 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:23,528 INFO L93 Difference]: Finished difference Result 10929 states and 17021 transitions. [2024-11-14 05:35:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 131 [2024-11-14 05:35:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:23,565 INFO L225 Difference]: With dead ends: 10929 [2024-11-14 05:35:23,565 INFO L226 Difference]: Without dead ends: 7504 [2024-11-14 05:35:23,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:23,582 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 338 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:23,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 542 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:35:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7504 states. [2024-11-14 05:35:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7504 to 7480. [2024-11-14 05:35:24,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 6250 states have (on average 1.44272) internal successors, (9017), 6288 states have internal predecessors, (9017), 876 states have call successors, (876), 335 states have call predecessors, (876), 352 states have return successors, (1319), 858 states have call predecessors, (1319), 873 states have call successors, (1319) [2024-11-14 05:35:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 11212 transitions. [2024-11-14 05:35:24,537 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 11212 transitions. Word has length 131 [2024-11-14 05:35:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:24,537 INFO L471 AbstractCegarLoop]: Abstraction has 7480 states and 11212 transitions. [2024-11-14 05:35:24,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 11212 transitions. [2024-11-14 05:35:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:24,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:24,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:24,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:35:24,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 05:35:24,750 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:24,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash 428355448, now seen corresponding path program 1 times [2024-11-14 05:35:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382927443] [2024-11-14 05:35:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:24,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382927443] [2024-11-14 05:35:24,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382927443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267015043] [2024-11-14 05:35:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:24,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:24,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:24,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:35:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:25,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:25,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:35:25,200 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267015043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:25,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153163897] [2024-11-14 05:35:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:25,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:25,203 INFO L87 Difference]: Start difference. First operand 7480 states and 11212 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:26,499 INFO L93 Difference]: Finished difference Result 20889 states and 32665 transitions. [2024-11-14 05:35:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 131 [2024-11-14 05:35:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:26,555 INFO L225 Difference]: With dead ends: 20889 [2024-11-14 05:35:26,555 INFO L226 Difference]: Without dead ends: 14124 [2024-11-14 05:35:26,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:26,579 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 326 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:26,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 542 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:35:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14124 states. [2024-11-14 05:35:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14124 to 14080. [2024-11-14 05:35:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14080 states, 11894 states have (on average 1.4508996132503784) internal successors, (17257), 11956 states have internal predecessors, (17257), 1592 states have call successors, (1592), 575 states have call predecessors, (1592), 592 states have return successors, (2419), 1550 states have call predecessors, (2419), 1589 states have call successors, (2419) [2024-11-14 05:35:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14080 states to 14080 states and 21268 transitions. [2024-11-14 05:35:27,948 INFO L78 Accepts]: Start accepts. Automaton has 14080 states and 21268 transitions. Word has length 131 [2024-11-14 05:35:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:27,948 INFO L471 AbstractCegarLoop]: Abstraction has 14080 states and 21268 transitions. [2024-11-14 05:35:27,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14080 states and 21268 transitions. [2024-11-14 05:35:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:27,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:27,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:27,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:35:28,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:35:28,166 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:28,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1373907850, now seen corresponding path program 1 times [2024-11-14 05:35:28,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:28,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419961694] [2024-11-14 05:35:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:28,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:28,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419961694] [2024-11-14 05:35:28,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419961694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:28,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255560137] [2024-11-14 05:35:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:28,279 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:28,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:35:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:28,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:28,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:35:28,575 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255560137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:28,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504922988] [2024-11-14 05:35:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:28,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:28,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:28,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:28,578 INFO L87 Difference]: Start difference. First operand 14080 states and 21268 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:30,676 INFO L93 Difference]: Finished difference Result 40569 states and 63389 transitions. [2024-11-14 05:35:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 131 [2024-11-14 05:35:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:30,791 INFO L225 Difference]: With dead ends: 40569 [2024-11-14 05:35:30,791 INFO L226 Difference]: Without dead ends: 27204 [2024-11-14 05:35:30,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:30,851 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 332 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:30,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 542 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:35:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27204 states. [2024-11-14 05:35:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27204 to 27120. [2024-11-14 05:35:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27120 states, 23062 states have (on average 1.452475934437603) internal successors, (33497), 23172 states have internal predecessors, (33497), 2984 states have call successors, (2984), 1055 states have call predecessors, (2984), 1072 states have return successors, (4547), 2894 states have call predecessors, (4547), 2981 states have call successors, (4547) [2024-11-14 05:35:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27120 states to 27120 states and 41028 transitions. [2024-11-14 05:35:33,529 INFO L78 Accepts]: Start accepts. Automaton has 27120 states and 41028 transitions. Word has length 131 [2024-11-14 05:35:33,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:33,530 INFO L471 AbstractCegarLoop]: Abstraction has 27120 states and 41028 transitions. [2024-11-14 05:35:33,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:33,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27120 states and 41028 transitions. [2024-11-14 05:35:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:33,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:33,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:33,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:35:33,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:33,752 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:33,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1121141492, now seen corresponding path program 1 times [2024-11-14 05:35:33,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211774487] [2024-11-14 05:35:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:35:33,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211774487] [2024-11-14 05:35:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211774487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:35:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800014107] [2024-11-14 05:35:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:35:33,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:35:33,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:35:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:34,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:35:34,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:35:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 05:35:34,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:35:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800014107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:34,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:35:34,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:35:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205015618] [2024-11-14 05:35:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:34,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:35:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:34,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:35:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:34,198 INFO L87 Difference]: Start difference. First operand 27120 states and 41028 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:35:38,479 INFO L93 Difference]: Finished difference Result 79449 states and 123709 transitions. [2024-11-14 05:35:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:35:38,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 131 [2024-11-14 05:35:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:35:38,712 INFO L225 Difference]: With dead ends: 79449 [2024-11-14 05:35:38,712 INFO L226 Difference]: Without dead ends: 53044 [2024-11-14 05:35:38,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:38,784 INFO L432 NwaCegarLoop]: 312 mSDtfsCounter, 323 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:35:38,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 542 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:35:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53044 states. [2024-11-14 05:35:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53044 to 52880. [2024-11-14 05:35:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52880 states, 45158 states have (on average 1.4503963860224103) internal successors, (65497), 45364 states have internal predecessors, (65497), 5688 states have call successors, (5688), 2015 states have call predecessors, (5688), 2032 states have return successors, (8659), 5502 states have call predecessors, (8659), 5685 states have call successors, (8659) [2024-11-14 05:35:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52880 states to 52880 states and 79844 transitions. [2024-11-14 05:35:44,581 INFO L78 Accepts]: Start accepts. Automaton has 52880 states and 79844 transitions. Word has length 131 [2024-11-14 05:35:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:35:44,582 INFO L471 AbstractCegarLoop]: Abstraction has 52880 states and 79844 transitions. [2024-11-14 05:35:44,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:35:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52880 states and 79844 transitions. [2024-11-14 05:35:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-14 05:35:44,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:35:44,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:35:44,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:35:44,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81cd5008-5e42-4c54-b87d-3baa18f7bddb/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:35:44,840 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:35:44,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:35:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1940656458, now seen corresponding path program 1 times [2024-11-14 05:35:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:35:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283469553] [2024-11-14 05:35:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:35:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:35:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:35:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-14 05:35:45,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:35:45,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283469553] [2024-11-14 05:35:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283469553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:35:45,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:35:45,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:35:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796958903] [2024-11-14 05:35:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:35:45,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:35:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:35:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:35:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:35:45,322 INFO L87 Difference]: Start difference. First operand 52880 states and 79844 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 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)