./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.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_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/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_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/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_b184e9aa-6574-4d79-8b9b-df67951033a7/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 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:00:30,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:00:30,661 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:00:30,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:00:30,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:00:30,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:00:30,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:00:30,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:00:30,729 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:00:30,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:00:30,734 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:00:30,736 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:00:30,736 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:00:30,738 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:00:30,739 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:00:30,739 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:00:30,740 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:00:30,740 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:00:30,741 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:00:30,741 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:00:30,742 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:00:30,744 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:00:30,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:00:30,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:00:30,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:00:30,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:00:30,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:00:30,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:00:30,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:00:30,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:00:30,750 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:00:30,751 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:00:30,751 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:00:30,751 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:00:30,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:00:30,752 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:00:30,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:30,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:00:30,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:00:30,753 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:00:30,754 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:00:30,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:00:30,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:00:30,755 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:00:30,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:00:30,756 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_b184e9aa-6574-4d79-8b9b-df67951033a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ead0301c8481fccc00f115bae086423ed9e315d4392b2a0732a4d381346437b [2023-11-19 05:00:31,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:00:31,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:00:31,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:00:31,062 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:00:31,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:00:31,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2023-11-19 05:00:34,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:00:34,679 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:00:34,680 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c [2023-11-19 05:00:34,709 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/data/39557d993/32f6341f984c4c2b9b08c4ad5b649d4b/FLAG369d7bcfb [2023-11-19 05:00:34,724 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/data/39557d993/32f6341f984c4c2b9b08c4ad5b649d4b [2023-11-19 05:00:34,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:00:34,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:00:34,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:34,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:00:34,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:00:34,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:34" (1/1) ... [2023-11-19 05:00:34,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d139694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:34, skipping insertion in model container [2023-11-19 05:00:34,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:00:34" (1/1) ... [2023-11-19 05:00:34,851 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:00:35,531 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_b184e9aa-6574-4d79-8b9b-df67951033a7/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2023-11-19 05:00:35,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:35,549 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:00:35,560 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [48] [2023-11-19 05:00:35,561 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [169] [2023-11-19 05:00:35,562 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [187] [2023-11-19 05:00:35,562 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [545] [2023-11-19 05:00:35,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [911] [2023-11-19 05:00:35,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [946] [2023-11-19 05:00:35,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1042] [2023-11-19 05:00:35,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1709] [2023-11-19 05:00:35,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3370] [2023-11-19 05:00:35,564 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [3379] [2023-11-19 05:00:35,747 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_b184e9aa-6574-4d79-8b9b-df67951033a7/sv-benchmarks/c/product-lines/elevator_spec14_product32.cil.c[71521,71534] [2023-11-19 05:00:35,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:00:35,789 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:00:35,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35 WrapperNode [2023-11-19 05:00:35,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:00:35,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:35,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:00:35,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:00:35,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,894 INFO L138 Inliner]: procedures = 96, calls = 348, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 906 [2023-11-19 05:00:35,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:00:35,895 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:00:35,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:00:35,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:00:35,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,986 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,991 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:35,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:36,009 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:00:36,010 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:00:36,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:00:36,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:00:36,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (1/1) ... [2023-11-19 05:00:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:00:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:36,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:00:36,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:00:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:00:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:00:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:00:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:00:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:00:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:00:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:00:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:00:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:00:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 05:00:36,113 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 05:00:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:00:36,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:00:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:00:36,113 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:00:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:00:36,114 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:00:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:00:36,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:00:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:00:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:00:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:00:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:00:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 05:00:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 05:00:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:00:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:00:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:00:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:00:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:00:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:00:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:00:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:00:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:00:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:00:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:00:36,117 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:00:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:00:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:00:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:00:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:00:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:00:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:00:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:00:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:00:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:00:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:00:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:00:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:00:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:00:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:00:36,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:00:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:00:36,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:00:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:00:36,121 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:00:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 05:00:36,121 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 05:00:36,282 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:00:36,286 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:00:37,529 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:00:38,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:00:38,493 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:00:38,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:38 BoogieIcfgContainer [2023-11-19 05:00:38,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:00:38,513 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:00:38,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:00:38,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:00:38,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:00:34" (1/3) ... [2023-11-19 05:00:38,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c90320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:38, skipping insertion in model container [2023-11-19 05:00:38,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:00:35" (2/3) ... [2023-11-19 05:00:38,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c90320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:00:38, skipping insertion in model container [2023-11-19 05:00:38,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:00:38" (3/3) ... [2023-11-19 05:00:38,522 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2023-11-19 05:00:38,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:00:38,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:00:38,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:00:38,638 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;@643b2318, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:00:38,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:00:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-19 05:00:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:00:38,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:38,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:38,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:38,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2050435802, now seen corresponding path program 1 times [2023-11-19 05:00:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470598674] [2023-11-19 05:00:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:00:39,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:39,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470598674] [2023-11-19 05:00:39,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470598674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:39,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:39,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:00:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715102652] [2023-11-19 05:00:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:00:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:00:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:39,640 INFO L87 Difference]: Start difference. First operand has 389 states, 257 states have (on average 1.5447470817120623) internal successors, (397), 275 states have internal predecessors, (397), 103 states have call successors, (103), 27 states have call predecessors, (103), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:00:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:40,213 INFO L93 Difference]: Finished difference Result 1143 states and 1798 transitions. [2023-11-19 05:00:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:00:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2023-11-19 05:00:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:40,247 INFO L225 Difference]: With dead ends: 1143 [2023-11-19 05:00:40,247 INFO L226 Difference]: Without dead ends: 755 [2023-11-19 05:00:40,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:00:40,264 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 577 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:40,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1169 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2023-11-19 05:00:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 719. [2023-11-19 05:00:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 489 states have (on average 1.5460122699386503) internal successors, (756), 515 states have internal predecessors, (756), 182 states have call successors, (182), 49 states have call predecessors, (182), 47 states have return successors, (187), 169 states have call predecessors, (187), 180 states have call successors, (187) [2023-11-19 05:00:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1125 transitions. [2023-11-19 05:00:40,450 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1125 transitions. Word has length 43 [2023-11-19 05:00:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:40,451 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 1125 transitions. [2023-11-19 05:00:40,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 05:00:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1125 transitions. [2023-11-19 05:00:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:00:40,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:40,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:00:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:00:40,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:40,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 654587187, now seen corresponding path program 1 times [2023-11-19 05:00:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:40,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113079958] [2023-11-19 05:00:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:00:41,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113079958] [2023-11-19 05:00:41,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113079958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:41,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:00:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618778080] [2023-11-19 05:00:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:41,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:00:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:00:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:41,026 INFO L87 Difference]: Start difference. First operand 719 states and 1125 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:00:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:43,793 INFO L93 Difference]: Finished difference Result 2315 states and 3667 transitions. [2023-11-19 05:00:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:00:43,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-11-19 05:00:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:43,815 INFO L225 Difference]: With dead ends: 2315 [2023-11-19 05:00:43,815 INFO L226 Difference]: Without dead ends: 1608 [2023-11-19 05:00:43,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:00:43,825 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1157 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:43,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 1269 Invalid, 2958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 05:00:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2023-11-19 05:00:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1466. [2023-11-19 05:00:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1000 states have (on average 1.543) internal successors, (1543), 1051 states have internal predecessors, (1543), 364 states have call successors, (364), 99 states have call predecessors, (364), 101 states have return successors, (408), 342 states have call predecessors, (408), 360 states have call successors, (408) [2023-11-19 05:00:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2315 transitions. [2023-11-19 05:00:44,001 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2315 transitions. Word has length 87 [2023-11-19 05:00:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:44,002 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 2315 transitions. [2023-11-19 05:00:44,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:00:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2315 transitions. [2023-11-19 05:00:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:00:44,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:44,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-19 05:00:44,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:00:44,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:44,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash 738263057, now seen corresponding path program 1 times [2023-11-19 05:00:44,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:44,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726750484] [2023-11-19 05:00:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:44,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:44,523 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 05:00:44,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:44,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726750484] [2023-11-19 05:00:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726750484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:44,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:44,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:00:44,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059912830] [2023-11-19 05:00:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:00:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:00:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:00:44,527 INFO L87 Difference]: Start difference. First operand 1466 states and 2315 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:00:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:47,760 INFO L93 Difference]: Finished difference Result 2125 states and 3326 transitions. [2023-11-19 05:00:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:00:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2023-11-19 05:00:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:47,792 INFO L225 Difference]: With dead ends: 2125 [2023-11-19 05:00:47,793 INFO L226 Difference]: Without dead ends: 2123 [2023-11-19 05:00:47,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:00:47,807 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 1457 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 4061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:47,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2000 Invalid, 4061 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [848 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-19 05:00:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2023-11-19 05:00:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1900. [2023-11-19 05:00:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1249 states have (on average 1.4971977582065652) internal successors, (1870), 1325 states have internal predecessors, (1870), 513 states have call successors, (513), 131 states have call predecessors, (513), 137 states have return successors, (581), 482 states have call predecessors, (581), 507 states have call successors, (581) [2023-11-19 05:00:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 2964 transitions. [2023-11-19 05:00:48,079 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 2964 transitions. Word has length 91 [2023-11-19 05:00:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:48,080 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 2964 transitions. [2023-11-19 05:00:48,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 05:00:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 2964 transitions. [2023-11-19 05:00:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 05:00:48,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:48,091 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-11-19 05:00:48,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:00:48,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:48,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1816828694, now seen corresponding path program 1 times [2023-11-19 05:00:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3895978] [2023-11-19 05:00:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:48,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-19 05:00:48,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3895978] [2023-11-19 05:00:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3895978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894658294] [2023-11-19 05:00:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:48,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:48,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:48,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:00:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:48,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:00:48,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-19 05:00:49,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894658294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:49,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:49,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-19 05:00:49,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125440267] [2023-11-19 05:00:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:49,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:00:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:00:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:00:49,097 INFO L87 Difference]: Start difference. First operand 1900 states and 2964 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:00:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:49,896 INFO L93 Difference]: Finished difference Result 3787 states and 5941 transitions. [2023-11-19 05:00:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:00:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2023-11-19 05:00:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:49,914 INFO L225 Difference]: With dead ends: 3787 [2023-11-19 05:00:49,915 INFO L226 Difference]: Without dead ends: 1898 [2023-11-19 05:00:49,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:00:49,930 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 391 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:49,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2291 Invalid, 350 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:00:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2023-11-19 05:00:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2023-11-19 05:00:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1249 states have (on average 1.4939951961569256) internal successors, (1866), 1321 states have internal predecessors, (1866), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2944 transitions. [2023-11-19 05:00:50,115 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2944 transitions. Word has length 121 [2023-11-19 05:00:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:50,116 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2944 transitions. [2023-11-19 05:00:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:00:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2944 transitions. [2023-11-19 05:00:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-19 05:00:50,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:50,122 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-11-19 05:00:50,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:50,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:50,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -270674715, now seen corresponding path program 1 times [2023-11-19 05:00:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:50,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276104306] [2023-11-19 05:00:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 05:00:50,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276104306] [2023-11-19 05:00:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276104306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:50,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:00:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728730600] [2023-11-19 05:00:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:50,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:50,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:50,567 INFO L87 Difference]: Start difference. First operand 1896 states and 2944 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:00:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:50,864 INFO L93 Difference]: Finished difference Result 3878 states and 6086 transitions. [2023-11-19 05:00:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2023-11-19 05:00:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:50,882 INFO L225 Difference]: With dead ends: 3878 [2023-11-19 05:00:50,882 INFO L226 Difference]: Without dead ends: 1994 [2023-11-19 05:00:50,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:00:50,897 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 30 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:50,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1647 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:00:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2023-11-19 05:00:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1908. [2023-11-19 05:00:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1261 states have (on average 1.4892942109436955) internal successors, (1878), 1333 states have internal predecessors, (1878), 509 states have call successors, (509), 131 states have call predecessors, (509), 137 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2956 transitions. [2023-11-19 05:00:51,105 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2956 transitions. Word has length 122 [2023-11-19 05:00:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:51,105 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2956 transitions. [2023-11-19 05:00:51,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 05:00:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2956 transitions. [2023-11-19 05:00:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:00:51,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:51,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2023-11-19 05:00:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:00:51,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:51,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2008186455, now seen corresponding path program 1 times [2023-11-19 05:00:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:51,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753179503] [2023-11-19 05:00:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-19 05:00:51,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753179503] [2023-11-19 05:00:51,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753179503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:51,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75617873] [2023-11-19 05:00:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:51,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:51,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:51,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:00:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:51,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:51,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:00:51,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:51,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75617873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:51,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-19 05:00:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396888658] [2023-11-19 05:00:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:00:51,941 INFO L87 Difference]: Start difference. First operand 1908 states and 2956 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:52,494 INFO L93 Difference]: Finished difference Result 3960 states and 6260 transitions. [2023-11-19 05:00:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2023-11-19 05:00:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:52,523 INFO L225 Difference]: With dead ends: 3960 [2023-11-19 05:00:52,523 INFO L226 Difference]: Without dead ends: 2064 [2023-11-19 05:00:52,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:00:52,543 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 213 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:52,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1446 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2023-11-19 05:00:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 2064. [2023-11-19 05:00:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1413 states have (on average 1.5357395612172682) internal successors, (2170), 1485 states have internal predecessors, (2170), 509 states have call successors, (509), 135 states have call predecessors, (509), 141 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 3248 transitions. [2023-11-19 05:00:52,754 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 3248 transitions. Word has length 129 [2023-11-19 05:00:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:52,755 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 3248 transitions. [2023-11-19 05:00:52,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 3248 transitions. [2023-11-19 05:00:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-19 05:00:52,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:52,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2023-11-19 05:00:52,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:52,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:52,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:52,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash -74726140, now seen corresponding path program 1 times [2023-11-19 05:00:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823711699] [2023-11-19 05:00:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:52,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-19 05:00:53,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823711699] [2023-11-19 05:00:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823711699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215817466] [2023-11-19 05:00:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:53,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:53,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:53,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:00:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:53,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:53,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:00:53,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215817466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:53,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:53,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:00:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234238714] [2023-11-19 05:00:53,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:53,693 INFO L87 Difference]: Start difference. First operand 2064 states and 3248 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:54,117 INFO L93 Difference]: Finished difference Result 4272 states and 6838 transitions. [2023-11-19 05:00:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:54,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2023-11-19 05:00:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:54,137 INFO L225 Difference]: With dead ends: 4272 [2023-11-19 05:00:54,137 INFO L226 Difference]: Without dead ends: 2220 [2023-11-19 05:00:54,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:54,153 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 211 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:54,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1446 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2023-11-19 05:00:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2220. [2023-11-19 05:00:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 1565 states have (on average 1.5731629392971247) internal successors, (2462), 1637 states have internal predecessors, (2462), 509 states have call successors, (509), 139 states have call predecessors, (509), 145 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3540 transitions. [2023-11-19 05:00:54,341 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3540 transitions. Word has length 134 [2023-11-19 05:00:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 2220 states and 3540 transitions. [2023-11-19 05:00:54,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3540 transitions. [2023-11-19 05:00:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 05:00:54,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:54,350 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2023-11-19 05:00:54,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:00:54,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:54,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1739134196, now seen corresponding path program 1 times [2023-11-19 05:00:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:54,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687647307] [2023-11-19 05:00:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-19 05:00:54,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:54,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687647307] [2023-11-19 05:00:54,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687647307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:54,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936655646] [2023-11-19 05:00:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:54,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:54,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:54,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:00:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:55,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 1522 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:55,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:00:55,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936655646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:55,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:00:55,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643221818] [2023-11-19 05:00:55,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:55,242 INFO L87 Difference]: Start difference. First operand 2220 states and 3540 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:55,658 INFO L93 Difference]: Finished difference Result 4584 states and 7416 transitions. [2023-11-19 05:00:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 138 [2023-11-19 05:00:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:55,679 INFO L225 Difference]: With dead ends: 4584 [2023-11-19 05:00:55,679 INFO L226 Difference]: Without dead ends: 2376 [2023-11-19 05:00:55,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:55,695 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 209 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:55,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1446 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2023-11-19 05:00:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2023-11-19 05:00:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1717 states have (on average 1.603960396039604) internal successors, (2754), 1789 states have internal predecessors, (2754), 509 states have call successors, (509), 143 states have call predecessors, (509), 149 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3832 transitions. [2023-11-19 05:00:55,925 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3832 transitions. Word has length 138 [2023-11-19 05:00:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:55,927 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3832 transitions. [2023-11-19 05:00:55,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3832 transitions. [2023-11-19 05:00:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-19 05:00:55,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:55,938 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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 05:00:55,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:56,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1379326665, now seen corresponding path program 1 times [2023-11-19 05:00:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799312479] [2023-11-19 05:00:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 05:00:56,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799312479] [2023-11-19 05:00:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799312479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:56,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145011689] [2023-11-19 05:00:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:56,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:56,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:56,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:00:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:56,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 1525 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:56,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:00:56,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145011689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:56,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:00:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153472526] [2023-11-19 05:00:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:56,743 INFO L87 Difference]: Start difference. First operand 2376 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:57,149 INFO L93 Difference]: Finished difference Result 4896 states and 7994 transitions. [2023-11-19 05:00:57,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 141 [2023-11-19 05:00:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:57,171 INFO L225 Difference]: With dead ends: 4896 [2023-11-19 05:00:57,171 INFO L226 Difference]: Without dead ends: 2532 [2023-11-19 05:00:57,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:57,187 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 207 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:57,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1446 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2023-11-19 05:00:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2023-11-19 05:00:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1869 states have (on average 1.6297485286249331) internal successors, (3046), 1941 states have internal predecessors, (3046), 509 states have call successors, (509), 147 states have call predecessors, (509), 153 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4124 transitions. [2023-11-19 05:00:57,518 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4124 transitions. Word has length 141 [2023-11-19 05:00:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:57,519 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4124 transitions. [2023-11-19 05:00:57,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4124 transitions. [2023-11-19 05:00:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 05:00:57,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:57,529 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:57,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:57,750 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:57,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1915164473, now seen corresponding path program 1 times [2023-11-19 05:00:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:57,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531563212] [2023-11-19 05:00:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:57,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 05:00:57,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:57,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531563212] [2023-11-19 05:00:57,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531563212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:57,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:57,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:00:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967343080] [2023-11-19 05:00:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:57,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:57,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:57,948 INFO L87 Difference]: Start difference. First operand 2532 states and 4124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 05:00:58,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:58,361 INFO L93 Difference]: Finished difference Result 5220 states and 8578 transitions. [2023-11-19 05:00:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2023-11-19 05:00:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:58,381 INFO L225 Difference]: With dead ends: 5220 [2023-11-19 05:00:58,381 INFO L226 Difference]: Without dead ends: 2668 [2023-11-19 05:00:58,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:00:58,399 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 99 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:58,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1459 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2023-11-19 05:00:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2023-11-19 05:00:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2001 states have (on average 1.5582208895552223) internal successors, (3118), 2073 states have internal predecessors, (3118), 509 states have call successors, (509), 151 states have call predecessors, (509), 157 states have return successors, (569), 482 states have call predecessors, (569), 503 states have call successors, (569) [2023-11-19 05:00:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4196 transitions. [2023-11-19 05:00:58,615 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4196 transitions. Word has length 143 [2023-11-19 05:00:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:58,616 INFO L495 AbstractCegarLoop]: Abstraction has 2668 states and 4196 transitions. [2023-11-19 05:00:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 05:00:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4196 transitions. [2023-11-19 05:00:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 05:00:58,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:58,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:00:58,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:58,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1352019160, now seen corresponding path program 1 times [2023-11-19 05:00:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:58,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915254617] [2023-11-19 05:00:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:58,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 05:00:58,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:58,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915254617] [2023-11-19 05:00:58,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915254617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:58,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:58,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:00:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454601838] [2023-11-19 05:00:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:58,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:00:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:00:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:00:58,992 INFO L87 Difference]: Start difference. First operand 2668 states and 4196 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-19 05:01:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:02,907 INFO L93 Difference]: Finished difference Result 6865 states and 10989 transitions. [2023-11-19 05:01:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 05:01:02,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 143 [2023-11-19 05:01:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:02,942 INFO L225 Difference]: With dead ends: 6865 [2023-11-19 05:01:02,942 INFO L226 Difference]: Without dead ends: 3844 [2023-11-19 05:01:02,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:01:02,955 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 1667 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 4107 mSolverCounterSat, 769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 4876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 4107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:02,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 1999 Invalid, 4876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 4107 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-19 05:01:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2023-11-19 05:01:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3666. [2023-11-19 05:01:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3666 states, 2616 states have (on average 1.480886850152905) internal successors, (3874), 2746 states have internal predecessors, (3874), 793 states have call successors, (793), 231 states have call predecessors, (793), 256 states have return successors, (988), 745 states have call predecessors, (988), 787 states have call successors, (988) [2023-11-19 05:01:03,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3666 states to 3666 states and 5655 transitions. [2023-11-19 05:01:03,290 INFO L78 Accepts]: Start accepts. Automaton has 3666 states and 5655 transitions. Word has length 143 [2023-11-19 05:01:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:03,291 INFO L495 AbstractCegarLoop]: Abstraction has 3666 states and 5655 transitions. [2023-11-19 05:01:03,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-11-19 05:01:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3666 states and 5655 transitions. [2023-11-19 05:01:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:01:03,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:03,299 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:03,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:01:03,300 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:03,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2060850148, now seen corresponding path program 1 times [2023-11-19 05:01:03,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:03,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980061927] [2023-11-19 05:01:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:03,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-19 05:01:07,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980061927] [2023-11-19 05:01:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980061927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688574992] [2023-11-19 05:01:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:07,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:07,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b184e9aa-6574-4d79-8b9b-df67951033a7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:01:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:08,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-19 05:01:08,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-19 05:01:11,626 INFO L327 TraceCheckSpWp]: Computing backward predicates...