./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ --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 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:16:55,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:16:55,748 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:16:55,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:16:55,757 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:16:55,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:16:55,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:16:55,797 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:16:55,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:16:55,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:16:55,799 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:16:55,800 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:16:55,800 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:16:55,801 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:16:55,802 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:16:55,802 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:16:55,803 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:16:55,803 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:16:55,804 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:16:55,805 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:16:55,805 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:16:55,806 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:16:55,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:16:55,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:16:55,808 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:16:55,808 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:16:55,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:16:55,809 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:16:55,810 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:16:55,810 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:16:55,811 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:16:55,811 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:16:55,812 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:16:55,812 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:16:55,812 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:16:55,813 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:16:55,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:16:55,813 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:16:55,814 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:16:55,814 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:16:55,814 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:16:55,815 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:16:55,815 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:16:55,815 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:16:55,816 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:16:55,816 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 [2023-11-19 04:16:56,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:16:56,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:16:56,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:16:56,092 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:16:56,093 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:16:56,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2023-11-19 04:16:59,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:16:59,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:16:59,649 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2023-11-19 04:16:59,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/data/140e514a7/cf9ed8a9959546e8b2f2d03f8c99e880/FLAG3bb3799bd [2023-11-19 04:16:59,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/data/140e514a7/cf9ed8a9959546e8b2f2d03f8c99e880 [2023-11-19 04:16:59,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:16:59,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:16:59,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:16:59,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:16:59,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:16:59,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:16:59" (1/1) ... [2023-11-19 04:16:59,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa21134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:16:59, skipping insertion in model container [2023-11-19 04:16:59,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:16:59" (1/1) ... [2023-11-19 04:16:59,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:17:00,039 WARN L240 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_b280046d-5787-437e-8cfc-f99cb531419f/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2023-11-19 04:17:00,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:17:00,495 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:17:00,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-19 04:17:00,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [57] [2023-11-19 04:17:00,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [95] [2023-11-19 04:17:00,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [287] [2023-11-19 04:17:00,509 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [653] [2023-11-19 04:17:00,509 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [752] [2023-11-19 04:17:00,509 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [770] [2023-11-19 04:17:00,510 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1437] [2023-11-19 04:17:00,510 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1557] [2023-11-19 04:17:00,510 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3170] [2023-11-19 04:17:00,513 WARN L240 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_b280046d-5787-437e-8cfc-f99cb531419f/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2023-11-19 04:17:00,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:17:00,641 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:17:00,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00 WrapperNode [2023-11-19 04:17:00,642 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:17:00,643 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:17:00,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:17:00,644 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:17:00,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,775 INFO L138 Inliner]: procedures = 95, calls = 355, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 988 [2023-11-19 04:17:00,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:17:00,776 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:17:00,776 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:17:00,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:17:00,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:17:00,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:17:00,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:17:00,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:17:00,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (1/1) ... [2023-11-19 04:17:00,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:17:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:00,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:17:01,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:17:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:17:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:17:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:17:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-19 04:17:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-19 04:17:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:17:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:17:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:17:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:17:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:17:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:17:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:17:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:17:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 04:17:01,069 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 04:17:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:17:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:17:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:17:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:17:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:17:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:17:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:17:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:17:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:17:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:17:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:17:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:17:01,071 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:17:01,071 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:17:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:17:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:17:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:17:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:17:01,072 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-19 04:17:01,072 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-19 04:17:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:17:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:17:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-19 04:17:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-19 04:17:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:17:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:17:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:17:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:17:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:17:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:17:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:17:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:17:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:17:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:17:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:17:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:17:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:17:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:17:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:17:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:17:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:17:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:17:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:17:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:17:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:17:01,277 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:17:01,280 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:17:02,494 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:17:03,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:17:03,506 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:17:03,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:17:03 BoogieIcfgContainer [2023-11-19 04:17:03,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:17:03,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:17:03,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:17:03,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:17:03,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:16:59" (1/3) ... [2023-11-19 04:17:03,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2785caae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:17:03, skipping insertion in model container [2023-11-19 04:17:03,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:17:00" (2/3) ... [2023-11-19 04:17:03,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2785caae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:17:03, skipping insertion in model container [2023-11-19 04:17:03,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:17:03" (3/3) ... [2023-11-19 04:17:03,525 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2023-11-19 04:17:03,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:17:03,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:17:03,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:17:03,643 INFO L357 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, mHoare=true, 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;@6c973b8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:17:03,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:17:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-19 04:17:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:17:03,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:03,689 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:03,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:03,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash 697331424, now seen corresponding path program 1 times [2023-11-19 04:17:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183342671] [2023-11-19 04:17:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:17:04,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:04,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183342671] [2023-11-19 04:17:04,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183342671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:04,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:04,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:17:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548866836] [2023-11-19 04:17:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:04,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:04,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:17:04,926 INFO L87 Difference]: Start difference. First operand has 427 states, 284 states have (on average 1.556338028169014) internal successors, (442), 302 states have internal predecessors, (442), 113 states have call successors, (113), 28 states have call predecessors, (113), 28 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 04:17:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:06,074 INFO L93 Difference]: Finished difference Result 1264 states and 2022 transitions. [2023-11-19 04:17:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:17:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2023-11-19 04:17:06,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:06,104 INFO L225 Difference]: With dead ends: 1264 [2023-11-19 04:17:06,105 INFO L226 Difference]: Without dead ends: 839 [2023-11-19 04:17:06,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:17:06,118 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 654 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:06,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 3143 Invalid, 533 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:17:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-11-19 04:17:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 788. [2023-11-19 04:17:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 536 states have (on average 1.5485074626865671) internal successors, (830), 566 states have internal predecessors, (830), 203 states have call successors, (203), 51 states have call predecessors, (203), 48 states have return successors, (213), 190 states have call predecessors, (213), 199 states have call successors, (213) [2023-11-19 04:17:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2023-11-19 04:17:06,262 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 88 [2023-11-19 04:17:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:06,263 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2023-11-19 04:17:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 04:17:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2023-11-19 04:17:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:17:06,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:06,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:17:06,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:06,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1689310144, now seen corresponding path program 1 times [2023-11-19 04:17:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:06,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994935950] [2023-11-19 04:17:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:06,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:06,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994935950] [2023-11-19 04:17:06,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994935950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765478801] [2023-11-19 04:17:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:06,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:06,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:06,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:17:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:07,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:07,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:07,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765478801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:07,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:07,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:07,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991042222] [2023-11-19 04:17:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:07,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:07,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:07,363 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:07,635 INFO L93 Difference]: Finished difference Result 2240 states and 3607 transitions. [2023-11-19 04:17:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2023-11-19 04:17:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:07,650 INFO L225 Difference]: With dead ends: 2240 [2023-11-19 04:17:07,650 INFO L226 Difference]: Without dead ends: 1464 [2023-11-19 04:17:07,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:07,659 INFO L413 NwaCegarLoop]: 1061 mSDtfsCounter, 588 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:07,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1589 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:17:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2023-11-19 04:17:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1431. [2023-11-19 04:17:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 980 states have (on average 1.5561224489795917) internal successors, (1525), 1039 states have internal predecessors, (1525), 359 states have call successors, (359), 92 states have call predecessors, (359), 91 states have return successors, (392), 339 states have call predecessors, (392), 355 states have call successors, (392) [2023-11-19 04:17:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2276 transitions. [2023-11-19 04:17:07,797 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2276 transitions. Word has length 87 [2023-11-19 04:17:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:07,798 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 2276 transitions. [2023-11-19 04:17:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:07,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2276 transitions. [2023-11-19 04:17:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 04:17:07,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:07,803 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:07,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:08,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 04:17:08,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:08,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1432353419, now seen corresponding path program 1 times [2023-11-19 04:17:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715152476] [2023-11-19 04:17:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:08,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715152476] [2023-11-19 04:17:08,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715152476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242829939] [2023-11-19 04:17:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:08,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:08,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:17:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:08,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:08,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:17:08,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:08,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242829939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:08,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:08,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372450221] [2023-11-19 04:17:08,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:08,827 INFO L87 Difference]: Start difference. First operand 1431 states and 2276 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 04:17:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:09,096 INFO L93 Difference]: Finished difference Result 2884 states and 4631 transitions. [2023-11-19 04:17:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2023-11-19 04:17:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:09,109 INFO L225 Difference]: With dead ends: 2884 [2023-11-19 04:17:09,109 INFO L226 Difference]: Without dead ends: 1465 [2023-11-19 04:17:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:09,125 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 20 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:09,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1216 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2023-11-19 04:17:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1459. [2023-11-19 04:17:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1004 states have (on average 1.546812749003984) internal successors, (1553), 1063 states have internal predecessors, (1553), 363 states have call successors, (363), 92 states have call predecessors, (363), 91 states have return successors, (396), 343 states have call predecessors, (396), 359 states have call successors, (396) [2023-11-19 04:17:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2312 transitions. [2023-11-19 04:17:09,226 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2312 transitions. Word has length 89 [2023-11-19 04:17:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:09,226 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2312 transitions. [2023-11-19 04:17:09,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 04:17:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2312 transitions. [2023-11-19 04:17:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:17:09,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:09,231 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:09,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:09,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:09,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:09,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1760498773, now seen corresponding path program 1 times [2023-11-19 04:17:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477920527] [2023-11-19 04:17:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:09,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:09,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477920527] [2023-11-19 04:17:09,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477920527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772853145] [2023-11-19 04:17:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:09,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:09,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:09,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:09,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:17:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:10,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:17:10,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:17:10,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772853145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:17:10,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33599814] [2023-11-19 04:17:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:17:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:17:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:10,339 INFO L87 Difference]: Start difference. First operand 1459 states and 2312 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:10,636 INFO L93 Difference]: Finished difference Result 3582 states and 5751 transitions. [2023-11-19 04:17:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:17:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2023-11-19 04:17:10,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:10,657 INFO L225 Difference]: With dead ends: 3582 [2023-11-19 04:17:10,657 INFO L226 Difference]: Without dead ends: 2135 [2023-11-19 04:17:10,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:10,671 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 588 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:10,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1630 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:17:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2023-11-19 04:17:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2090. [2023-11-19 04:17:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1442 states have (on average 1.552011095700416) internal successors, (2238), 1530 states have internal predecessors, (2238), 516 states have call successors, (516), 130 states have call predecessors, (516), 131 states have return successors, (572), 489 states have call predecessors, (572), 512 states have call successors, (572) [2023-11-19 04:17:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3326 transitions. [2023-11-19 04:17:10,826 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3326 transitions. Word has length 88 [2023-11-19 04:17:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:10,827 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3326 transitions. [2023-11-19 04:17:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:17:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3326 transitions. [2023-11-19 04:17:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 04:17:10,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:10,833 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:10,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:11,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:11,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1959516769, now seen corresponding path program 1 times [2023-11-19 04:17:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:11,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808773416] [2023-11-19 04:17:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:17:11,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808773416] [2023-11-19 04:17:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808773416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:11,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288649231] [2023-11-19 04:17:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:11,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:11,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:11,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:17:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:11,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:17:11,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:17:12,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:12,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288649231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:12,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:12,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-19 04:17:12,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435673157] [2023-11-19 04:17:12,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:12,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:17:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:17:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:17:12,029 INFO L87 Difference]: Start difference. First operand 2090 states and 3326 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:17:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:13,173 INFO L93 Difference]: Finished difference Result 5585 states and 9075 transitions. [2023-11-19 04:17:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:17:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-19 04:17:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:13,210 INFO L225 Difference]: With dead ends: 5585 [2023-11-19 04:17:13,210 INFO L226 Difference]: Without dead ends: 3507 [2023-11-19 04:17:13,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:17:13,242 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 544 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 2673 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:13,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 2673 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:17:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2023-11-19 04:17:13,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3474. [2023-11-19 04:17:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 2387 states have (on average 1.4960201089233347) internal successors, (3571), 2536 states have internal predecessors, (3571), 859 states have call successors, (859), 232 states have call predecessors, (859), 227 states have return successors, (1007), 801 states have call predecessors, (1007), 853 states have call successors, (1007) [2023-11-19 04:17:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 5437 transitions. [2023-11-19 04:17:13,493 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 5437 transitions. Word has length 89 [2023-11-19 04:17:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:13,493 INFO L495 AbstractCegarLoop]: Abstraction has 3474 states and 5437 transitions. [2023-11-19 04:17:13,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:17:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 5437 transitions. [2023-11-19 04:17:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 04:17:13,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:13,498 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:13,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:13,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:13,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 775477769, now seen corresponding path program 1 times [2023-11-19 04:17:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101799696] [2023-11-19 04:17:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:17:14,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101799696] [2023-11-19 04:17:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101799696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:14,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:14,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:17:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34935759] [2023-11-19 04:17:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:14,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:17:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:17:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:14,284 INFO L87 Difference]: Start difference. First operand 3474 states and 5437 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:17:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:15,402 INFO L93 Difference]: Finished difference Result 9943 states and 15906 transitions. [2023-11-19 04:17:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:17:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2023-11-19 04:17:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:15,469 INFO L225 Difference]: With dead ends: 9943 [2023-11-19 04:17:15,470 INFO L226 Difference]: Without dead ends: 6481 [2023-11-19 04:17:15,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:17:15,508 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 640 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 3854 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:15,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 3854 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:17:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2023-11-19 04:17:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 6348. [2023-11-19 04:17:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 4419 states have (on average 1.4964924190993438) internal successors, (6613), 4690 states have internal predecessors, (6613), 1517 states have call successors, (1517), 419 states have call predecessors, (1517), 411 states have return successors, (1956), 1388 states have call predecessors, (1956), 1509 states have call successors, (1956) [2023-11-19 04:17:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 10086 transitions. [2023-11-19 04:17:16,128 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 10086 transitions. Word has length 94 [2023-11-19 04:17:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:16,128 INFO L495 AbstractCegarLoop]: Abstraction has 6348 states and 10086 transitions. [2023-11-19 04:17:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 04:17:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 10086 transitions. [2023-11-19 04:17:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 04:17:16,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:16,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:17:16,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:16,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:16,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2047814120, now seen corresponding path program 1 times [2023-11-19 04:17:16,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073425715] [2023-11-19 04:17:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:17:16,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073425715] [2023-11-19 04:17:16,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073425715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:17:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385396903] [2023-11-19 04:17:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:16,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:17:16,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:17:16,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:17:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:16,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 04:17:16,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:17:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:17:17,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:17:17,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385396903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:17,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:17:17,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-19 04:17:17,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846411529] [2023-11-19 04:17:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:17,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:17:17,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:17:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:17:17,280 INFO L87 Difference]: Start difference. First operand 6348 states and 10086 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-19 04:17:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:19,290 INFO L93 Difference]: Finished difference Result 13489 states and 21441 transitions. [2023-11-19 04:17:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:17:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 100 [2023-11-19 04:17:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:19,348 INFO L225 Difference]: With dead ends: 13489 [2023-11-19 04:17:19,348 INFO L226 Difference]: Without dead ends: 7153 [2023-11-19 04:17:19,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:17:19,382 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1386 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:19,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 2026 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 04:17:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2023-11-19 04:17:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 7116. [2023-11-19 04:17:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7116 states, 4987 states have (on average 1.4756366553037898) internal successors, (7359), 5274 states have internal predecessors, (7359), 1661 states have call successors, (1661), 483 states have call predecessors, (1661), 467 states have return successors, (2140), 1508 states have call predecessors, (2140), 1653 states have call successors, (2140) [2023-11-19 04:17:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7116 states to 7116 states and 11160 transitions. [2023-11-19 04:17:19,991 INFO L78 Accepts]: Start accepts. Automaton has 7116 states and 11160 transitions. Word has length 100 [2023-11-19 04:17:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:19,992 INFO L495 AbstractCegarLoop]: Abstraction has 7116 states and 11160 transitions. [2023-11-19 04:17:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-19 04:17:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7116 states and 11160 transitions. [2023-11-19 04:17:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 04:17:19,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:19,996 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:20,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:17:20,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b280046d-5787-437e-8cfc-f99cb531419f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:17:20,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:20,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1518506732, now seen corresponding path program 1 times [2023-11-19 04:17:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:20,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261371885] [2023-11-19 04:17:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 04:17:20,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261371885] [2023-11-19 04:17:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261371885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:20,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:20,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:17:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544841299] [2023-11-19 04:17:20,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:20,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:17:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:17:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:17:20,617 INFO L87 Difference]: Start difference. First operand 7116 states and 11160 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:17:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:21,704 INFO L93 Difference]: Finished difference Result 14452 states and 23052 transitions. [2023-11-19 04:17:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:17:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2023-11-19 04:17:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:21,779 INFO L225 Difference]: With dead ends: 14452 [2023-11-19 04:17:21,779 INFO L226 Difference]: Without dead ends: 8573 [2023-11-19 04:17:21,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:17:21,819 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 141 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:21,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3789 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:17:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8573 states. [2023-11-19 04:17:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8573 to 7993. [2023-11-19 04:17:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7993 states, 5499 states have (on average 1.4699036188397892) internal successors, (8083), 5911 states have internal predecessors, (8083), 1997 states have call successors, (1997), 483 states have call predecessors, (1997), 496 states have return successors, (2568), 1826 states have call predecessors, (2568), 1989 states have call successors, (2568) [2023-11-19 04:17:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7993 states to 7993 states and 12648 transitions. [2023-11-19 04:17:22,524 INFO L78 Accepts]: Start accepts. Automaton has 7993 states and 12648 transitions. Word has length 107 [2023-11-19 04:17:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:22,525 INFO L495 AbstractCegarLoop]: Abstraction has 7993 states and 12648 transitions. [2023-11-19 04:17:22,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:17:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7993 states and 12648 transitions. [2023-11-19 04:17:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 04:17:22,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:22,530 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:17:22,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:22,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:22,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1233590534, now seen corresponding path program 1 times [2023-11-19 04:17:22,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:22,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667740732] [2023-11-19 04:17:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:17:23,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:23,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667740732] [2023-11-19 04:17:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667740732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:23,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:23,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 04:17:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578147643] [2023-11-19 04:17:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:17:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:17:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:17:23,423 INFO L87 Difference]: Start difference. First operand 7993 states and 12648 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-19 04:17:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:28,711 INFO L93 Difference]: Finished difference Result 20596 states and 33240 transitions. [2023-11-19 04:17:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 04:17:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 109 [2023-11-19 04:17:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:28,825 INFO L225 Difference]: With dead ends: 20596 [2023-11-19 04:17:28,826 INFO L226 Difference]: Without dead ends: 14626 [2023-11-19 04:17:28,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-19 04:17:28,874 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1939 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 4653 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 5512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:28,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2051 Valid, 2829 Invalid, 5512 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [859 Valid, 4653 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 04:17:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14626 states. [2023-11-19 04:17:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14626 to 12485. [2023-11-19 04:17:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12485 states, 8835 states have (on average 1.4713073005093378) internal successors, (12999), 9310 states have internal predecessors, (12999), 2768 states have call successors, (2768), 825 states have call predecessors, (2768), 881 states have return successors, (3932), 2577 states have call predecessors, (3932), 2756 states have call successors, (3932) [2023-11-19 04:17:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12485 states to 12485 states and 19699 transitions. [2023-11-19 04:17:30,247 INFO L78 Accepts]: Start accepts. Automaton has 12485 states and 19699 transitions. Word has length 109 [2023-11-19 04:17:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:30,248 INFO L495 AbstractCegarLoop]: Abstraction has 12485 states and 19699 transitions. [2023-11-19 04:17:30,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-19 04:17:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 12485 states and 19699 transitions. [2023-11-19 04:17:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-19 04:17:30,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:30,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:17:30,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1808933457, now seen corresponding path program 1 times [2023-11-19 04:17:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676703956] [2023-11-19 04:17:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 04:17:30,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:30,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676703956] [2023-11-19 04:17:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676703956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:30,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:30,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:17:30,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973149481] [2023-11-19 04:17:30,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:30,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:17:30,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:17:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:17:30,771 INFO L87 Difference]: Start difference. First operand 12485 states and 19699 transitions. Second operand has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-19 04:17:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:17:32,189 INFO L93 Difference]: Finished difference Result 17865 states and 28276 transitions. [2023-11-19 04:17:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:17:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 136 [2023-11-19 04:17:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:17:32,267 INFO L225 Difference]: With dead ends: 17865 [2023-11-19 04:17:32,268 INFO L226 Difference]: Without dead ends: 12562 [2023-11-19 04:17:32,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:17:32,304 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 490 mSDsluCounter, 3832 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:17:32,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 4520 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:17:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12562 states. [2023-11-19 04:17:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12562 to 12537. [2023-11-19 04:17:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 8875 states have (on average 1.4700845070422535) internal successors, (13047), 9350 states have internal predecessors, (13047), 2772 states have call successors, (2772), 825 states have call predecessors, (2772), 889 states have return successors, (3928), 2589 states have call predecessors, (3928), 2760 states have call successors, (3928) [2023-11-19 04:17:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 19747 transitions. [2023-11-19 04:17:33,362 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 19747 transitions. Word has length 136 [2023-11-19 04:17:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:17:33,363 INFO L495 AbstractCegarLoop]: Abstraction has 12537 states and 19747 transitions. [2023-11-19 04:17:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-19 04:17:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 19747 transitions. [2023-11-19 04:17:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-19 04:17:33,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:17:33,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:17:33,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:17:33,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:17:33,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:17:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -362627644, now seen corresponding path program 1 times [2023-11-19 04:17:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:17:33,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277944330] [2023-11-19 04:17:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:17:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:17:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:17:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-19 04:17:34,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:17:34,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277944330] [2023-11-19 04:17:34,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277944330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:17:34,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:17:34,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 04:17:34,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920126946] [2023-11-19 04:17:34,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:17:34,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:17:34,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:17:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:17:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:17:34,221 INFO L87 Difference]: Start difference. First operand 12537 states and 19747 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24)