./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje --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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:43:18,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:43:18,349 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:43:18,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:43:18,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:43:18,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:43:18,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:43:18,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:43:18,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:43:18,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:43:18,410 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:43:18,411 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:43:18,411 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:43:18,412 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:43:18,412 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:43:18,413 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:43:18,413 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:43:18,414 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:43:18,414 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:43:18,415 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:43:18,415 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:43:18,416 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:43:18,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:43:18,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:43:18,418 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:43:18,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:43:18,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:43:18,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:43:18,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:43:18,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:43:18,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:43:18,421 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:43:18,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:43:18,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:43:18,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:43:18,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:43:18,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:43:18,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:43:18,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:43:18,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:43:18,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:43:18,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:43:18,431 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:43:18,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:43:18,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:43:18,433 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:43:18,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:43:18,434 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_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2024-11-09 05:43:18,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:43:18,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:43:18,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:43:18,844 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:43:18,844 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:43:18,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c Unable to find full path for "g++" [2024-11-09 05:43:21,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:43:21,967 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:43:21,972 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2024-11-09 05:43:22,009 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/data/a671991ef/05853a6cdc6b454492c9bcfda1117467/FLAGb39a5cfc8 [2024-11-09 05:43:22,132 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/data/a671991ef/05853a6cdc6b454492c9bcfda1117467 [2024-11-09 05:43:22,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:43:22,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:43:22,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:43:22,139 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:43:22,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:43:22,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:43:22" (1/1) ... [2024-11-09 05:43:22,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11723780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:22, skipping insertion in model container [2024-11-09 05:43:22,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:43:22" (1/1) ... [2024-11-09 05:43:22,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:43:23,031 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2024-11-09 05:43:23,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:43:23,062 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:43:23,077 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [48] [2024-11-09 05:43:23,080 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1613] [2024-11-09 05:43:23,080 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1707] [2024-11-09 05:43:23,081 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [1825] [2024-11-09 05:43:23,082 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2012] [2024-11-09 05:43:23,082 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2030] [2024-11-09 05:43:23,083 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2381] [2024-11-09 05:43:23,083 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3042] [2024-11-09 05:43:23,084 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3077] [2024-11-09 05:43:23,084 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3443] [2024-11-09 05:43:23,312 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2024-11-09 05:43:23,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:43:23,370 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:43:23,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23 WrapperNode [2024-11-09 05:43:23,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:43:23,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:43:23,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:43:23,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:43:23,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,415 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,511 INFO L138 Inliner]: procedures = 93, calls = 348, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1133 [2024-11-09 05:43:23,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:43:23,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:43:23,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:43:23,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:43:23,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,643 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:43:23,669 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:43:23,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:43:23,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:43:23,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (1/1) ... [2024-11-09 05:43:23,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:43:23,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:23,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:43:23,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:43:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:43:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-09 05:43:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-09 05:43:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-09 05:43:23,765 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-09 05:43:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-09 05:43:23,766 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-09 05:43:23,766 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-09 05:43:23,766 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-09 05:43:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-09 05:43:23,767 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-09 05:43:23,767 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-09 05:43:23,767 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-09 05:43:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-09 05:43:23,768 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-09 05:43:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-09 05:43:23,768 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-09 05:43:23,768 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-09 05:43:23,769 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-09 05:43:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-09 05:43:23,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-09 05:43:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-09 05:43:23,770 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-09 05:43:23,770 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-09 05:43:23,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-09 05:43:23,770 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-09 05:43:23,771 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-09 05:43:23,771 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-09 05:43:23,771 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-09 05:43:23,771 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-09 05:43:23,772 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-09 05:43:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-09 05:43:23,772 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-09 05:43:23,772 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-09 05:43:23,772 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2024-11-09 05:43:23,773 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-09 05:43:23,773 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-09 05:43:23,773 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-09 05:43:23,773 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-09 05:43:23,774 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-09 05:43:23,774 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-09 05:43:23,774 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-09 05:43:23,774 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-09 05:43:23,774 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-09 05:43:23,775 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-09 05:43:23,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:43:23,775 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-09 05:43:23,775 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-09 05:43:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-09 05:43:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-09 05:43:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-09 05:43:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-09 05:43:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-09 05:43:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-09 05:43:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:43:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:43:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-09 05:43:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-09 05:43:23,978 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:43:23,982 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:43:25,998 INFO L? ?]: Removed 469 outVars from TransFormulas that were not future-live. [2024-11-09 05:43:25,999 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:43:27,270 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:43:27,270 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:43:27,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:43:27 BoogieIcfgContainer [2024-11-09 05:43:27,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:43:27,276 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:43:27,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:43:27,280 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:43:27,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:43:22" (1/3) ... [2024-11-09 05:43:27,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204aa529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:43:27, skipping insertion in model container [2024-11-09 05:43:27,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:43:23" (2/3) ... [2024-11-09 05:43:27,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204aa529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:43:27, skipping insertion in model container [2024-11-09 05:43:27,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:43:27" (3/3) ... [2024-11-09 05:43:27,285 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2024-11-09 05:43:27,308 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:43:27,309 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:43:27,432 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:43:27,442 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f94d26b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:43:27,443 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:43:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 05:43:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:43:27,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:27,488 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:27,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:27,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash -136210460, now seen corresponding path program 1 times [2024-11-09 05:43:27,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:27,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956529766] [2024-11-09 05:43:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:43:28,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956529766] [2024-11-09 05:43:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956529766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:43:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:43:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37367918] [2024-11-09 05:43:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:28,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:43:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:43:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:43:28,941 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 05:43:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:30,121 INFO L93 Difference]: Finished difference Result 1181 states and 1890 transitions. [2024-11-09 05:43:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2024-11-09 05:43:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:30,144 INFO L225 Difference]: With dead ends: 1181 [2024-11-09 05:43:30,144 INFO L226 Difference]: Without dead ends: 773 [2024-11-09 05:43:30,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:43:30,166 INFO L432 NwaCegarLoop]: 652 mSDtfsCounter, 590 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:30,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 2974 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:43:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2024-11-09 05:43:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 754. [2024-11-09 05:43:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 514 states have (on average 1.5603112840466926) internal successors, (802), 544 states have internal predecessors, (802), 193 states have call successors, (193), 49 states have call predecessors, (193), 46 states have return successors, (200), 180 states have call predecessors, (200), 189 states have call successors, (200) [2024-11-09 05:43:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2024-11-09 05:43:30,296 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 88 [2024-11-09 05:43:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:30,297 INFO L471 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2024-11-09 05:43:30,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 05:43:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2024-11-09 05:43:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 05:43:30,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:30,305 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:30,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:43:30,306 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:30,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash 6447040, now seen corresponding path program 1 times [2024-11-09 05:43:30,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956312088] [2024-11-09 05:43:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:30,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:30,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956312088] [2024-11-09 05:43:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956312088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835176638] [2024-11-09 05:43:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:30,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:30,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:43:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:31,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:43:31,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:31,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835176638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:31,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:31,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:43:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290654723] [2024-11-09 05:43:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:31,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:43:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:43:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:31,484 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:43:31,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:31,795 INFO L93 Difference]: Finished difference Result 2138 states and 3454 transitions. [2024-11-09 05:43:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:43:31,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2024-11-09 05:43:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:31,815 INFO L225 Difference]: With dead ends: 2138 [2024-11-09 05:43:31,815 INFO L226 Difference]: Without dead ends: 1396 [2024-11-09 05:43:31,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:31,823 INFO L432 NwaCegarLoop]: 1022 mSDtfsCounter, 565 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:31,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1526 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2024-11-09 05:43:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1363. [2024-11-09 05:43:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 936 states have (on average 1.5694444444444444) internal successors, (1469), 995 states have internal predecessors, (1469), 339 states have call successors, (339), 88 states have call predecessors, (339), 87 states have return successors, (366), 319 states have call predecessors, (366), 335 states have call successors, (366) [2024-11-09 05:43:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2174 transitions. [2024-11-09 05:43:31,925 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2174 transitions. Word has length 87 [2024-11-09 05:43:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:31,926 INFO L471 AbstractCegarLoop]: Abstraction has 1363 states and 2174 transitions. [2024-11-09 05:43:31,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:43:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2174 transitions. [2024-11-09 05:43:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 05:43:31,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:31,931 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:31,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:43:32,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:32,133 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:32,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash -902933184, now seen corresponding path program 1 times [2024-11-09 05:43:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503440311] [2024-11-09 05:43:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:32,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503440311] [2024-11-09 05:43:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503440311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548493422] [2024-11-09 05:43:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:32,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:32,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:43:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:32,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:43:32,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:43:32,995 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548493422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:32,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:32,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:43:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016985345] [2024-11-09 05:43:32,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:32,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:43:32,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:43:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:32,998 INFO L87 Difference]: Start difference. First operand 1363 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:43:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:33,226 INFO L93 Difference]: Finished difference Result 2744 states and 4421 transitions. [2024-11-09 05:43:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:43:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2024-11-09 05:43:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:33,238 INFO L225 Difference]: With dead ends: 2744 [2024-11-09 05:43:33,238 INFO L226 Difference]: Without dead ends: 1393 [2024-11-09 05:43:33,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:33,251 INFO L432 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:33,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1168 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:43:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2024-11-09 05:43:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1391. [2024-11-09 05:43:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 960 states have (on average 1.559375) internal successors, (1497), 1019 states have internal predecessors, (1497), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (370), 323 states have call predecessors, (370), 339 states have call successors, (370) [2024-11-09 05:43:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2210 transitions. [2024-11-09 05:43:33,332 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2210 transitions. Word has length 89 [2024-11-09 05:43:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:33,333 INFO L471 AbstractCegarLoop]: Abstraction has 1391 states and 2210 transitions. [2024-11-09 05:43:33,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-09 05:43:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2210 transitions. [2024-11-09 05:43:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:43:33,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:33,336 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:33,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:43:33,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:33,538 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:33,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 425389724, now seen corresponding path program 1 times [2024-11-09 05:43:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609534797] [2024-11-09 05:43:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:33,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609534797] [2024-11-09 05:43:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609534797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527060916] [2024-11-09 05:43:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:33,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:33,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:33,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:33,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:43:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:34,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:43:34,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:43:34,443 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527060916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:34,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:34,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:43:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101410411] [2024-11-09 05:43:34,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:34,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:43:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:43:34,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:34,446 INFO L87 Difference]: Start difference. First operand 1391 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:43:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:34,820 INFO L93 Difference]: Finished difference Result 3412 states and 5496 transitions. [2024-11-09 05:43:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:43:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2024-11-09 05:43:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:34,839 INFO L225 Difference]: With dead ends: 3412 [2024-11-09 05:43:34,840 INFO L226 Difference]: Without dead ends: 2033 [2024-11-09 05:43:34,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:43:34,853 INFO L432 NwaCegarLoop]: 1067 mSDtfsCounter, 564 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:34,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1572 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2024-11-09 05:43:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1988. [2024-11-09 05:43:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1376 states have (on average 1.565406976744186) internal successors, (2154), 1464 states have internal predecessors, (2154), 486 states have call successors, (486), 124 states have call predecessors, (486), 125 states have return successors, (533), 459 states have call predecessors, (533), 482 states have call successors, (533) [2024-11-09 05:43:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3173 transitions. [2024-11-09 05:43:35,010 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3173 transitions. Word has length 88 [2024-11-09 05:43:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:35,011 INFO L471 AbstractCegarLoop]: Abstraction has 1988 states and 3173 transitions. [2024-11-09 05:43:35,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 05:43:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3173 transitions. [2024-11-09 05:43:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 05:43:35,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:35,016 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:35,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:43:35,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:35,217 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:35,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash 785525772, now seen corresponding path program 1 times [2024-11-09 05:43:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886229505] [2024-11-09 05:43:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 05:43:35,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:35,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886229505] [2024-11-09 05:43:35,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886229505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:35,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919785353] [2024-11-09 05:43:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:35,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:35,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:35,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:43:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:35,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:43:35,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 05:43:36,082 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:36,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919785353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:36,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:36,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-09 05:43:36,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371901013] [2024-11-09 05:43:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:36,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:43:36,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:43:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-09 05:43:36,084 INFO L87 Difference]: Start difference. First operand 1988 states and 3173 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 05:43:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:37,196 INFO L93 Difference]: Finished difference Result 5291 states and 8553 transitions. [2024-11-09 05:43:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2024-11-09 05:43:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:37,224 INFO L225 Difference]: With dead ends: 5291 [2024-11-09 05:43:37,224 INFO L226 Difference]: Without dead ends: 3315 [2024-11-09 05:43:37,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:43:37,246 INFO L432 NwaCegarLoop]: 608 mSDtfsCounter, 513 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:37,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 2732 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:43:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2024-11-09 05:43:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3282. [2024-11-09 05:43:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2263 states have (on average 1.5081749889527176) internal successors, (3413), 2412 states have internal predecessors, (3413), 803 states have call successors, (803), 220 states have call predecessors, (803), 215 states have return successors, (906), 745 states have call predecessors, (906), 797 states have call successors, (906) [2024-11-09 05:43:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 5122 transitions. [2024-11-09 05:43:37,482 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 5122 transitions. Word has length 89 [2024-11-09 05:43:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:37,483 INFO L471 AbstractCegarLoop]: Abstraction has 3282 states and 5122 transitions. [2024-11-09 05:43:37,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-09 05:43:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 5122 transitions. [2024-11-09 05:43:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-09 05:43:37,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:37,486 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:37,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:37,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:37,687 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:37,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1398070654, now seen corresponding path program 1 times [2024-11-09 05:43:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:37,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153809228] [2024-11-09 05:43:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:37,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:43:38,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:38,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153809228] [2024-11-09 05:43:38,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153809228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:38,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443279695] [2024-11-09 05:43:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:38,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:38,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:38,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:43:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:38,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:43:38,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 05:43:39,111 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:39,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443279695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:39,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:39,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2024-11-09 05:43:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61171722] [2024-11-09 05:43:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:39,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:43:39,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:43:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:43:39,114 INFO L87 Difference]: Start difference. First operand 3282 states and 5122 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-09 05:43:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:40,993 INFO L93 Difference]: Finished difference Result 6903 states and 10769 transitions. [2024-11-09 05:43:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:43:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2024-11-09 05:43:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:41,021 INFO L225 Difference]: With dead ends: 6903 [2024-11-09 05:43:41,022 INFO L226 Difference]: Without dead ends: 3633 [2024-11-09 05:43:41,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:43:41,045 INFO L432 NwaCegarLoop]: 612 mSDtfsCounter, 1078 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:41,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1950 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:43:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2024-11-09 05:43:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3622. [2024-11-09 05:43:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2519 states have (on average 1.4890829694323144) internal successors, (3751), 2676 states have internal predecessors, (3751), 863 states have call successors, (863), 248 states have call predecessors, (863), 239 states have return successors, (968), 793 states have call predecessors, (968), 857 states have call successors, (968) [2024-11-09 05:43:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 5582 transitions. [2024-11-09 05:43:41,278 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 5582 transitions. Word has length 94 [2024-11-09 05:43:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:41,279 INFO L471 AbstractCegarLoop]: Abstraction has 3622 states and 5582 transitions. [2024-11-09 05:43:41,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-09 05:43:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 5582 transitions. [2024-11-09 05:43:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 05:43:41,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:41,282 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:43:41,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:41,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:41,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1095405294, now seen corresponding path program 1 times [2024-11-09 05:43:41,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:41,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367668835] [2024-11-09 05:43:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:41,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:43:42,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:42,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367668835] [2024-11-09 05:43:42,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367668835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:42,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814089402] [2024-11-09 05:43:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:42,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:42,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:42,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:43:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:42,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:43:42,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:43:42,777 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:42,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814089402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:42,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:42,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-09 05:43:42,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842427419] [2024-11-09 05:43:42,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:42,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:43:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:43:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:43:42,781 INFO L87 Difference]: Start difference. First operand 3622 states and 5582 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:43:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:43,220 INFO L93 Difference]: Finished difference Result 6453 states and 9971 transitions. [2024-11-09 05:43:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:43:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2024-11-09 05:43:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:43,250 INFO L225 Difference]: With dead ends: 6453 [2024-11-09 05:43:43,250 INFO L226 Difference]: Without dead ends: 3672 [2024-11-09 05:43:43,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:43:43,268 INFO L432 NwaCegarLoop]: 592 mSDtfsCounter, 0 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:43,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2954 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:43:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2024-11-09 05:43:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2024-11-09 05:43:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2559 states have (on average 1.4814380617428684) internal successors, (3791), 2716 states have internal predecessors, (3791), 863 states have call successors, (863), 248 states have call predecessors, (863), 249 states have return successors, (988), 803 states have call predecessors, (988), 857 states have call successors, (988) [2024-11-09 05:43:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5642 transitions. [2024-11-09 05:43:43,551 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5642 transitions. Word has length 99 [2024-11-09 05:43:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:43,552 INFO L471 AbstractCegarLoop]: Abstraction has 3672 states and 5642 transitions. [2024-11-09 05:43:43,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-09 05:43:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5642 transitions. [2024-11-09 05:43:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:43:43,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:43,593 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:43,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:43:43,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:43,794 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:43,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:43,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2110292752, now seen corresponding path program 1 times [2024-11-09 05:43:43,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:43,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582970123] [2024-11-09 05:43:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:43,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:43:44,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:44,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582970123] [2024-11-09 05:43:44,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582970123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:44,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415419326] [2024-11-09 05:43:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:44,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:44,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:43:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:45,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 05:43:45,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:43:45,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:43:46,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415419326] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:46,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:43:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2024-11-09 05:43:46,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715935412] [2024-11-09 05:43:46,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:46,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:43:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:43:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:43:46,134 INFO L87 Difference]: Start difference. First operand 3672 states and 5642 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 05:43:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:50,640 INFO L93 Difference]: Finished difference Result 9646 states and 15326 transitions. [2024-11-09 05:43:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:43:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2024-11-09 05:43:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:50,729 INFO L225 Difference]: With dead ends: 9646 [2024-11-09 05:43:50,729 INFO L226 Difference]: Without dead ends: 7181 [2024-11-09 05:43:50,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 05:43:50,754 INFO L432 NwaCegarLoop]: 598 mSDtfsCounter, 1910 mSDsluCounter, 2312 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:50,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1996 Valid, 2910 Invalid, 3015 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [854 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-09 05:43:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2024-11-09 05:43:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 7064. [2024-11-09 05:43:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 5022 states have (on average 1.4900438072481084) internal successors, (7483), 5280 states have internal predecessors, (7483), 1527 states have call successors, (1527), 484 states have call predecessors, (1527), 514 states have return successors, (2020), 1443 states have call predecessors, (2020), 1519 states have call successors, (2020) [2024-11-09 05:43:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 11030 transitions. [2024-11-09 05:43:51,491 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 11030 transitions. Word has length 103 [2024-11-09 05:43:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:51,492 INFO L471 AbstractCegarLoop]: Abstraction has 7064 states and 11030 transitions. [2024-11-09 05:43:51,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-09 05:43:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 11030 transitions. [2024-11-09 05:43:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 05:43:51,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:51,502 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:51,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:43:51,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:51,704 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:51,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1392970493, now seen corresponding path program 1 times [2024-11-09 05:43:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436437011] [2024-11-09 05:43:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:43:52,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436437011] [2024-11-09 05:43:52,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436437011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463658520] [2024-11-09 05:43:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:52,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:52,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:52,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:43:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:53,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:43:53,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:43:53,304 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:43:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463658520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:43:53,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:43:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-09 05:43:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929766325] [2024-11-09 05:43:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:53,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:43:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:43:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:43:53,309 INFO L87 Difference]: Start difference. First operand 7064 states and 11030 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-09 05:43:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:43:54,831 INFO L93 Difference]: Finished difference Result 12935 states and 20222 transitions. [2024-11-09 05:43:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:43:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2024-11-09 05:43:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:43:54,932 INFO L225 Difference]: With dead ends: 12935 [2024-11-09 05:43:54,933 INFO L226 Difference]: Without dead ends: 7086 [2024-11-09 05:43:54,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-09 05:43:54,972 INFO L432 NwaCegarLoop]: 654 mSDtfsCounter, 424 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:43:54,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2356 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:43:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7086 states. [2024-11-09 05:43:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7086 to 7064. [2024-11-09 05:43:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 5022 states have (on average 1.4900438072481084) internal successors, (7483), 5280 states have internal predecessors, (7483), 1527 states have call successors, (1527), 484 states have call predecessors, (1527), 514 states have return successors, (2012), 1443 states have call predecessors, (2012), 1519 states have call successors, (2012) [2024-11-09 05:43:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 11022 transitions. [2024-11-09 05:43:55,715 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 11022 transitions. Word has length 107 [2024-11-09 05:43:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:43:55,716 INFO L471 AbstractCegarLoop]: Abstraction has 7064 states and 11022 transitions. [2024-11-09 05:43:55,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2024-11-09 05:43:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 11022 transitions. [2024-11-09 05:43:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:43:55,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:43:55,724 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:43:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:43:55,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:55,929 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:43:55,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:43:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash 980650388, now seen corresponding path program 1 times [2024-11-09 05:43:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:43:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450547255] [2024-11-09 05:43:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:43:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 05:43:56,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:43:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450547255] [2024-11-09 05:43:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450547255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:56,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249629645] [2024-11-09 05:43:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:43:56,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:43:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:43:56,753 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:43:56,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:43:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:43:57,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:43:57,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:43:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 05:43:57,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:43:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-09 05:43:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249629645] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:43:58,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:43:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 27 [2024-11-09 05:43:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591666014] [2024-11-09 05:43:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:43:58,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 05:43:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:43:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 05:43:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:43:58,350 INFO L87 Difference]: Start difference. First operand 7064 states and 11022 transitions. Second operand has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 05:44:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:03,519 INFO L93 Difference]: Finished difference Result 14855 states and 23792 transitions. [2024-11-09 05:44:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:44:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 134 [2024-11-09 05:44:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:03,655 INFO L225 Difference]: With dead ends: 14855 [2024-11-09 05:44:03,655 INFO L226 Difference]: Without dead ends: 14852 [2024-11-09 05:44:03,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 05:44:03,667 INFO L432 NwaCegarLoop]: 607 mSDtfsCounter, 3253 mSDsluCounter, 2786 mSDsCounter, 0 mSdLazyCounter, 3307 mSolverCounterSat, 1361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 4668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1361 IncrementalHoareTripleChecker+Valid, 3307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:03,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3393 Invalid, 4668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1361 Valid, 3307 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-09 05:44:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14852 states. [2024-11-09 05:44:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14852 to 13405. [2024-11-09 05:44:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13405 states, 9702 states have (on average 1.5086580086580086) internal successors, (14637), 10151 states have internal predecessors, (14637), 2719 states have call successors, (2719), 888 states have call predecessors, (2719), 983 states have return successors, (3640), 2617 states have call predecessors, (3640), 2707 states have call successors, (3640) [2024-11-09 05:44:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13405 states to 13405 states and 20996 transitions. [2024-11-09 05:44:04,935 INFO L78 Accepts]: Start accepts. Automaton has 13405 states and 20996 transitions. Word has length 134 [2024-11-09 05:44:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:04,936 INFO L471 AbstractCegarLoop]: Abstraction has 13405 states and 20996 transitions. [2024-11-09 05:44:04,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2024-11-09 05:44:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 13405 states and 20996 transitions. [2024-11-09 05:44:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 05:44:04,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:04,949 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:04,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:05,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:44:05,150 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:05,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash -849570433, now seen corresponding path program 1 times [2024-11-09 05:44:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:05,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113973694] [2024-11-09 05:44:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:05,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-09 05:44:05,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:05,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113973694] [2024-11-09 05:44:05,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113973694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:05,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82480571] [2024-11-09 05:44:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:05,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:05,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:05,558 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:05,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:44:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:06,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:44:06,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:44:06,153 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:44:06,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82480571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:06,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:44:06,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-09 05:44:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571370309] [2024-11-09 05:44:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:06,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:44:06,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:44:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-09 05:44:06,155 INFO L87 Difference]: Start difference. First operand 13405 states and 20996 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-09 05:44:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:10,041 INFO L93 Difference]: Finished difference Result 28980 states and 46057 transitions. [2024-11-09 05:44:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:44:10,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) Word has length 160 [2024-11-09 05:44:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:10,156 INFO L225 Difference]: With dead ends: 28980 [2024-11-09 05:44:10,157 INFO L226 Difference]: Without dead ends: 15345 [2024-11-09 05:44:10,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:44:10,220 INFO L432 NwaCegarLoop]: 416 mSDtfsCounter, 1435 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:10,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1529 Valid, 1802 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 05:44:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15345 states. [2024-11-09 05:44:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15345 to 13395. [2024-11-09 05:44:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 9692 states have (on average 1.508976475443665) internal successors, (14625), 10141 states have internal predecessors, (14625), 2719 states have call successors, (2719), 888 states have call predecessors, (2719), 983 states have return successors, (3640), 2617 states have call predecessors, (3640), 2707 states have call successors, (3640) [2024-11-09 05:44:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 20984 transitions. [2024-11-09 05:44:11,843 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 20984 transitions. Word has length 160 [2024-11-09 05:44:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:11,844 INFO L471 AbstractCegarLoop]: Abstraction has 13395 states and 20984 transitions. [2024-11-09 05:44:11,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-09 05:44:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 20984 transitions. [2024-11-09 05:44:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-09 05:44:11,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:11,856 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:11,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:44:12,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:44:12,057 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:12,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:12,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1158193661, now seen corresponding path program 1 times [2024-11-09 05:44:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:12,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379310383] [2024-11-09 05:44:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:12,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-11-09 05:44:13,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379310383] [2024-11-09 05:44:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379310383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002643913] [2024-11-09 05:44:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:13,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:13,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:13,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:44:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:13,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 1974 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:44:13,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:44:13,807 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:44:13,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002643913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:13,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:44:13,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2024-11-09 05:44:13,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690243786] [2024-11-09 05:44:13,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:13,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:44:13,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:44:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:44:13,810 INFO L87 Difference]: Start difference. First operand 13395 states and 20984 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-09 05:44:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:15,340 INFO L93 Difference]: Finished difference Result 31346 states and 49865 transitions. [2024-11-09 05:44:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:44:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 167 [2024-11-09 05:44:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:15,491 INFO L225 Difference]: With dead ends: 31346 [2024-11-09 05:44:15,492 INFO L226 Difference]: Without dead ends: 17963 [2024-11-09 05:44:15,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:44:15,568 INFO L432 NwaCegarLoop]: 735 mSDtfsCounter, 492 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:15,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1314 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:44:15,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17963 states. [2024-11-09 05:44:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17963 to 17754. [2024-11-09 05:44:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 12858 states have (on average 1.5101104370819722) internal successors, (19417), 13468 states have internal predecessors, (19417), 3590 states have call successors, (3590), 1168 states have call predecessors, (3590), 1305 states have return successors, (4849), 3459 states have call predecessors, (4849), 3578 states have call successors, (4849) [2024-11-09 05:44:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 27856 transitions. [2024-11-09 05:44:17,575 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 27856 transitions. Word has length 167 [2024-11-09 05:44:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:17,578 INFO L471 AbstractCegarLoop]: Abstraction has 17754 states and 27856 transitions. [2024-11-09 05:44:17,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-09 05:44:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 27856 transitions. [2024-11-09 05:44:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 05:44:17,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:17,603 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:17,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:44:17,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:44:17,804 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:17,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1452899871, now seen corresponding path program 1 times [2024-11-09 05:44:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922475595] [2024-11-09 05:44:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-09 05:44:19,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922475595] [2024-11-09 05:44:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922475595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416509618] [2024-11-09 05:44:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:19,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:19,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:19,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:44:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:19,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 05:44:19,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:44:20,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:44:20,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416509618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:44:20,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:44:20,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2024-11-09 05:44:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115857526] [2024-11-09 05:44:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:44:20,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 05:44:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:44:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 05:44:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:44:20,004 INFO L87 Difference]: Start difference. First operand 17754 states and 27856 transitions. Second operand has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-09 05:44:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:44:23,500 INFO L93 Difference]: Finished difference Result 45166 states and 71351 transitions. [2024-11-09 05:44:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:44:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) Word has length 172 [2024-11-09 05:44:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:44:23,777 INFO L225 Difference]: With dead ends: 45166 [2024-11-09 05:44:23,778 INFO L226 Difference]: Without dead ends: 29256 [2024-11-09 05:44:23,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2024-11-09 05:44:23,849 INFO L432 NwaCegarLoop]: 645 mSDtfsCounter, 563 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 4287 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:44:23,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 4287 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:44:23,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29256 states. [2024-11-09 05:44:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29256 to 29154. [2024-11-09 05:44:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29154 states, 21200 states have (on average 1.517311320754717) internal successors, (32167), 22158 states have internal predecessors, (32167), 5826 states have call successors, (5826), 1930 states have call predecessors, (5826), 2127 states have return successors, (7869), 5623 states have call predecessors, (7869), 5806 states have call successors, (7869) [2024-11-09 05:44:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29154 states to 29154 states and 45862 transitions. [2024-11-09 05:44:26,479 INFO L78 Accepts]: Start accepts. Automaton has 29154 states and 45862 transitions. Word has length 172 [2024-11-09 05:44:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:44:26,480 INFO L471 AbstractCegarLoop]: Abstraction has 29154 states and 45862 transitions. [2024-11-09 05:44:26,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-09 05:44:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29154 states and 45862 transitions. [2024-11-09 05:44:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-09 05:44:26,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:44:26,497 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:44:26,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:44:26,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:44:26,698 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:44:26,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:44:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1460872271, now seen corresponding path program 1 times [2024-11-09 05:44:26,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:44:26,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32570923] [2024-11-09 05:44:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:26,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:44:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 05:44:27,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:44:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32570923] [2024-11-09 05:44:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32570923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:44:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835878842] [2024-11-09 05:44:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:44:27,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:44:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:44:27,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:44:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bed2f81-18a7-4e13-a1dc-07ff86782f34/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:44:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:44:28,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 1999 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 05:44:28,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:44:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 05:44:28,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:44:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 05:44:28,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835878842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:44:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [794703912] [2024-11-09 05:44:29,007 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2024-11-09 05:44:29,008 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:44:29,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:44:29,018 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:44:29,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:44:57,917 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 698 for LOIs