./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:30:11,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:30:11,950 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:30:11,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:30:11,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:30:12,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:30:12,004 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:30:12,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:30:12,006 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:30:12,012 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:30:12,012 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:30:12,013 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:30:12,013 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:30:12,015 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:30:12,015 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:30:12,016 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:30:12,016 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:30:12,016 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:30:12,017 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:30:12,018 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:30:12,018 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:30:12,019 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:30:12,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:30:12,020 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:30:12,021 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:30:12,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:30:12,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:30:12,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:30:12,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:30:12,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:30:12,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:30:12,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:30:12,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:30:12,025 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:30:12,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:30:12,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:30:12,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:30:12,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:12,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:30:12,028 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:30:12,028 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:30:12,028 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:30:12,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:30:12,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:30:12,030 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:30:12,030 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:30:12,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:30:12,030 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_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2023-11-23 21:30:12,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:30:12,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:30:12,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:30:12,330 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:30:12,331 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:30:12,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-11-23 21:30:15,474 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:30:15,888 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:30:15,889 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-11-23 21:30:15,916 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/data/b94e4b4de/c2bdf39ec05143ed876e2b3fa96f61b1/FLAG84775000e [2023-11-23 21:30:15,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/data/b94e4b4de/c2bdf39ec05143ed876e2b3fa96f61b1 [2023-11-23 21:30:15,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:30:15,943 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:30:15,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:15,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:30:15,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:30:15,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:15" (1/1) ... [2023-11-23 21:30:15,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7134690b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:15, skipping insertion in model container [2023-11-23 21:30:15,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:30:15" (1/1) ... [2023-11-23 21:30:16,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:30:16,557 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2023-11-23 21:30:16,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:16,733 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:30:16,745 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-11-23 21:30:16,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [86] [2023-11-23 21:30:16,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [452] [2023-11-23 21:30:16,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1120] [2023-11-23 21:30:16,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1476] [2023-11-23 21:30:16,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1485] [2023-11-23 21:30:16,748 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2984] [2023-11-23 21:30:16,748 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3102] [2023-11-23 21:30:16,748 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3288] [2023-11-23 21:30:16,748 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3303] [2023-11-23 21:30:16,848 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2023-11-23 21:30:16,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:30:17,016 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:30:17,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17 WrapperNode [2023-11-23 21:30:17,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:30:17,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:17,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:30:17,018 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:30:17,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,115 INFO L138 Inliner]: procedures = 90, calls = 344, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 818 [2023-11-23 21:30:17,115 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:30:17,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:30:17,116 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:30:17,116 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:30:17,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,133 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,134 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,198 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,253 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:30:17,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:30:17,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:30:17,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:30:17,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (1/1) ... [2023-11-23 21:30:17,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:30:17,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:17,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:30:17,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:30:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:30:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-23 21:30:17,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-23 21:30:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 21:30:17,346 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 21:30:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:30:17,347 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:30:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:30:17,347 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:30:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-23 21:30:17,348 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-23 21:30:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:30:17,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:30:17,350 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:30:17,350 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:30:17,350 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:30:17,352 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:30:17,352 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:30:17,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:30:17,353 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:30:17,353 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:30:17,353 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:30:17,353 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:30:17,353 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:30:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:30:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-23 21:30:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-23 21:30:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:30:17,354 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:30:17,354 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:30:17,355 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:30:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-23 21:30:17,355 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-23 21:30:17,355 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:30:17,355 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:30:17,356 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:30:17,356 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:30:17,356 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:30:17,356 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:30:17,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:30:17,356 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-11-23 21:30:17,357 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-11-23 21:30:17,357 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-23 21:30:17,357 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-23 21:30:17,357 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:30:17,357 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:30:17,357 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:30:17,358 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:30:17,358 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:30:17,359 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:30:17,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:30:17,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:30:17,360 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:30:17,360 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:30:17,542 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:30:17,546 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:30:19,009 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:30:19,933 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:30:19,933 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:30:19,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:19 BoogieIcfgContainer [2023-11-23 21:30:19,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:30:19,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:30:19,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:30:19,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:30:19,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:30:15" (1/3) ... [2023-11-23 21:30:19,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350b711a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:19, skipping insertion in model container [2023-11-23 21:30:19,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:30:17" (2/3) ... [2023-11-23 21:30:19,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350b711a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:30:19, skipping insertion in model container [2023-11-23 21:30:19,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:30:19" (3/3) ... [2023-11-23 21:30:19,946 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2023-11-23 21:30:19,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:30:19,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:30:20,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:30:20,053 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41adec76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:30:20,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:30:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-23 21:30:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:30:20,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:20,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:20,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:20,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:20,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1711241531, now seen corresponding path program 1 times [2023-11-23 21:30:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774749579] [2023-11-23 21:30:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:20,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774749579] [2023-11-23 21:30:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774749579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:20,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779415984] [2023-11-23 21:30:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:20,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:20,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:21,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:21,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:30:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:21,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:21,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:21,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779415984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:21,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:21,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 21:30:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12550385] [2023-11-23 21:30:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:21,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:21,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:21,495 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:30:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:21,795 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2023-11-23 21:30:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-23 21:30:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:21,820 INFO L225 Difference]: With dead ends: 1095 [2023-11-23 21:30:21,821 INFO L226 Difference]: Without dead ends: 707 [2023-11-23 21:30:21,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:21,835 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 584 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:21,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1071 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2023-11-23 21:30:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2023-11-23 21:30:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2023-11-23 21:30:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2023-11-23 21:30:22,043 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2023-11-23 21:30:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:22,045 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2023-11-23 21:30:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:30:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2023-11-23 21:30:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:30:22,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:22,058 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:22,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:22,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:30:22,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:22,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2123936037, now seen corresponding path program 1 times [2023-11-23 21:30:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524731217] [2023-11-23 21:30:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:22,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:22,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524731217] [2023-11-23 21:30:22,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524731217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:30:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90514439] [2023-11-23 21:30:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:22,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:22,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:22,782 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:30:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:23,193 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2023-11-23 21:30:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2023-11-23 21:30:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:23,213 INFO L225 Difference]: With dead ends: 2057 [2023-11-23 21:30:23,213 INFO L226 Difference]: Without dead ends: 1374 [2023-11-23 21:30:23,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:30:23,220 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 576 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:23,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1175 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:30:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2023-11-23 21:30:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2023-11-23 21:30:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2023-11-23 21:30:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2023-11-23 21:30:23,365 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2023-11-23 21:30:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:23,367 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2023-11-23 21:30:23,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:30:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2023-11-23 21:30:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:30:23,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:23,377 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:30:23,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:23,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:23,379 INFO L85 PathProgramCache]: Analyzing trace with hash -989504650, now seen corresponding path program 1 times [2023-11-23 21:30:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:23,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852731529] [2023-11-23 21:30:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:23,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:23,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:23,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852731529] [2023-11-23 21:30:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852731529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:23,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:30:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427171626] [2023-11-23 21:30:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:30:23,840 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:30:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:24,188 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2023-11-23 21:30:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2023-11-23 21:30:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:24,206 INFO L225 Difference]: With dead ends: 2993 [2023-11-23 21:30:24,206 INFO L226 Difference]: Without dead ends: 1715 [2023-11-23 21:30:24,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:30:24,217 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 435 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:24,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1552 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2023-11-23 21:30:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2023-11-23 21:30:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2023-11-23 21:30:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2023-11-23 21:30:24,401 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2023-11-23 21:30:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:24,404 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2023-11-23 21:30:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:30:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2023-11-23 21:30:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:30:24,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:24,411 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:30:24,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:24,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -993934377, now seen corresponding path program 1 times [2023-11-23 21:30:24,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:24,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92513397] [2023-11-23 21:30:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:24,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:24,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:24,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92513397] [2023-11-23 21:30:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92513397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:24,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:30:24,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:30:24,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810390417] [2023-11-23 21:30:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:24,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:30:24,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:30:24,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:30:24,953 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:30:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:25,839 INFO L93 Difference]: Finished difference Result 4228 states and 6953 transitions. [2023-11-23 21:30:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2023-11-23 21:30:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:25,863 INFO L225 Difference]: With dead ends: 4228 [2023-11-23 21:30:25,863 INFO L226 Difference]: Without dead ends: 2567 [2023-11-23 21:30:25,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:30:25,883 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 603 mSDsluCounter, 2277 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:25,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 2918 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:30:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-11-23 21:30:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2429. [2023-11-23 21:30:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2023-11-23 21:30:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2023-11-23 21:30:26,150 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2023-11-23 21:30:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:26,151 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2023-11-23 21:30:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:30:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2023-11-23 21:30:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:30:26,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:26,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:30:26,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:26,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -943417923, now seen corresponding path program 1 times [2023-11-23 21:30:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062622764] [2023-11-23 21:30:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:26,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062622764] [2023-11-23 21:30:26,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062622764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:26,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71960475] [2023-11-23 21:30:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:26,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:26,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:26,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:30:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:26,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:30:26,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:26,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:26,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71960475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:26,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:26,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 21:30:26,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090065505] [2023-11-23 21:30:26,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:30:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:30:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:26,923 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:30:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:27,317 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2023-11-23 21:30:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:30:27,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2023-11-23 21:30:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:27,357 INFO L225 Difference]: With dead ends: 5961 [2023-11-23 21:30:27,358 INFO L226 Difference]: Without dead ends: 3544 [2023-11-23 21:30:27,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:30:27,383 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 551 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:27,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1057 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2023-11-23 21:30:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2023-11-23 21:30:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2023-11-23 21:30:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2023-11-23 21:30:27,743 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2023-11-23 21:30:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:27,743 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2023-11-23 21:30:27,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 21:30:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2023-11-23 21:30:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:30:27,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:27,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:27,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:27,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:27,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:27,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash -649634521, now seen corresponding path program 1 times [2023-11-23 21:30:27,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:27,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965919243] [2023-11-23 21:30:27,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:27,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:30:28,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:28,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965919243] [2023-11-23 21:30:28,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965919243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:28,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637415113] [2023-11-23 21:30:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:28,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:28,342 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:30:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:28,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:30:28,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:30:28,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637415113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:28,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-23 21:30:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972356432] [2023-11-23 21:30:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:30:28,840 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:30:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:29,661 INFO L93 Difference]: Finished difference Result 8598 states and 14203 transitions. [2023-11-23 21:30:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2023-11-23 21:30:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:29,713 INFO L225 Difference]: With dead ends: 8598 [2023-11-23 21:30:29,713 INFO L226 Difference]: Without dead ends: 5211 [2023-11-23 21:30:29,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:30:29,750 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 489 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:29,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 1661 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2023-11-23 21:30:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 5160. [2023-11-23 21:30:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 3634 states have (on average 1.507705008255366) internal successors, (5479), 3848 states have internal predecessors, (5479), 1175 states have call successors, (1175), 336 states have call predecessors, (1175), 350 states have return successors, (1524), 1081 states have call predecessors, (1524), 1164 states have call successors, (1524) [2023-11-23 21:30:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 8178 transitions. [2023-11-23 21:30:30,183 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 8178 transitions. Word has length 71 [2023-11-23 21:30:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:30,184 INFO L495 AbstractCegarLoop]: Abstraction has 5160 states and 8178 transitions. [2023-11-23 21:30:30,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:30:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 8178 transitions. [2023-11-23 21:30:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 21:30:30,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:30,188 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:30:30,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:30,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:30:30,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:30,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash -962344497, now seen corresponding path program 1 times [2023-11-23 21:30:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:30,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173951045] [2023-11-23 21:30:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:31,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173951045] [2023-11-23 21:30:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173951045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744884951] [2023-11-23 21:30:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:31,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:31,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:31,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:30:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:31,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:30:31,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:31,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744884951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:31,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-23 21:30:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072099241] [2023-11-23 21:30:31,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:31,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:30:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:30:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:30:31,675 INFO L87 Difference]: Start difference. First operand 5160 states and 8178 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:30:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:32,393 INFO L93 Difference]: Finished difference Result 10206 states and 16530 transitions. [2023-11-23 21:30:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:30:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2023-11-23 21:30:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:32,459 INFO L225 Difference]: With dead ends: 10206 [2023-11-23 21:30:32,459 INFO L226 Difference]: Without dead ends: 6225 [2023-11-23 21:30:32,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:30:32,492 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:32,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1709 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:30:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2023-11-23 21:30:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 5190. [2023-11-23 21:30:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5190 states, 3664 states have (on average 1.5035480349344978) internal successors, (5509), 3878 states have internal predecessors, (5509), 1175 states have call successors, (1175), 336 states have call predecessors, (1175), 350 states have return successors, (1524), 1081 states have call predecessors, (1524), 1164 states have call successors, (1524) [2023-11-23 21:30:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 8208 transitions. [2023-11-23 21:30:33,117 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 8208 transitions. Word has length 80 [2023-11-23 21:30:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:33,118 INFO L495 AbstractCegarLoop]: Abstraction has 5190 states and 8208 transitions. [2023-11-23 21:30:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:30:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 8208 transitions. [2023-11-23 21:30:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 21:30:33,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:33,129 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:33,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:30:33,343 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:33,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 753105675, now seen corresponding path program 1 times [2023-11-23 21:30:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:33,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134723857] [2023-11-23 21:30:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:30:34,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:34,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134723857] [2023-11-23 21:30:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134723857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784283282] [2023-11-23 21:30:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:34,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:34,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:30:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:34,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:34,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:34,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:30:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784283282] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:35,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:35,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2023-11-23 21:30:35,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939962035] [2023-11-23 21:30:35,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:35,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:30:35,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:35,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:30:35,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:30:35,158 INFO L87 Difference]: Start difference. First operand 5190 states and 8208 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-23 21:30:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:38,125 INFO L93 Difference]: Finished difference Result 10748 states and 17175 transitions. [2023-11-23 21:30:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:30:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2023-11-23 21:30:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:38,211 INFO L225 Difference]: With dead ends: 10748 [2023-11-23 21:30:38,211 INFO L226 Difference]: Without dead ends: 6755 [2023-11-23 21:30:38,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:30:38,236 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1351 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:38,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 1911 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:30:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2023-11-23 21:30:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 5864. [2023-11-23 21:30:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5864 states, 4149 states have (on average 1.4851771511207519) internal successors, (6162), 4406 states have internal predecessors, (6162), 1306 states have call successors, (1306), 360 states have call predecessors, (1306), 408 states have return successors, (1797), 1200 states have call predecessors, (1797), 1295 states have call successors, (1797) [2023-11-23 21:30:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 9265 transitions. [2023-11-23 21:30:38,961 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 9265 transitions. Word has length 84 [2023-11-23 21:30:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:38,962 INFO L495 AbstractCegarLoop]: Abstraction has 5864 states and 9265 transitions. [2023-11-23 21:30:38,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-23 21:30:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 9265 transitions. [2023-11-23 21:30:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 21:30:38,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:38,967 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 21:30:39,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:39,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:30:39,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:39,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash 43240933, now seen corresponding path program 1 times [2023-11-23 21:30:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202481227] [2023-11-23 21:30:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:30:39,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:39,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202481227] [2023-11-23 21:30:39,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202481227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236568543] [2023-11-23 21:30:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:39,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:39,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:39,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:30:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:40,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:30:40,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:40,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:30:41,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236568543] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:41,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:41,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2023-11-23 21:30:41,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189935272] [2023-11-23 21:30:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:30:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:30:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:30:41,268 INFO L87 Difference]: Start difference. First operand 5864 states and 9265 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 21:30:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:46,272 INFO L93 Difference]: Finished difference Result 17084 states and 29364 transitions. [2023-11-23 21:30:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:30:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-11-23 21:30:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:46,383 INFO L225 Difference]: With dead ends: 17084 [2023-11-23 21:30:46,384 INFO L226 Difference]: Without dead ends: 12855 [2023-11-23 21:30:46,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:30:46,433 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 3025 mSDsluCounter, 2269 mSDsCounter, 0 mSdLazyCounter, 2194 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3114 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 2194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:46,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3114 Valid, 2846 Invalid, 3581 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1387 Valid, 2194 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:30:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12855 states. [2023-11-23 21:30:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12855 to 11265. [2023-11-23 21:30:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11265 states, 8099 states have (on average 1.4930238301024819) internal successors, (12092), 8542 states have internal predecessors, (12092), 2354 states have call successors, (2354), 681 states have call predecessors, (2354), 811 states have return successors, (4065), 2201 states have call predecessors, (4065), 2337 states have call successors, (4065) [2023-11-23 21:30:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11265 states to 11265 states and 18511 transitions. [2023-11-23 21:30:47,692 INFO L78 Accepts]: Start accepts. Automaton has 11265 states and 18511 transitions. Word has length 87 [2023-11-23 21:30:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:47,694 INFO L495 AbstractCegarLoop]: Abstraction has 11265 states and 18511 transitions. [2023-11-23 21:30:47,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 21:30:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11265 states and 18511 transitions. [2023-11-23 21:30:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 21:30:47,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:47,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:47,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:47,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:30:47,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:47,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:47,918 INFO L85 PathProgramCache]: Analyzing trace with hash -918847682, now seen corresponding path program 1 times [2023-11-23 21:30:47,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:47,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259133094] [2023-11-23 21:30:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:30:48,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:48,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259133094] [2023-11-23 21:30:48,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259133094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:48,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749311642] [2023-11-23 21:30:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:48,770 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:48,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:30:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:49,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:30:49,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:49,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:30:49,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749311642] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:49,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:49,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2023-11-23 21:30:49,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614478218] [2023-11-23 21:30:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:49,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:30:49,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:49,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:30:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:30:49,726 INFO L87 Difference]: Start difference. First operand 11265 states and 18511 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 21:30:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:52,543 INFO L93 Difference]: Finished difference Result 22458 states and 37495 transitions. [2023-11-23 21:30:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2023-11-23 21:30:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:52,648 INFO L225 Difference]: With dead ends: 22458 [2023-11-23 21:30:52,648 INFO L226 Difference]: Without dead ends: 12828 [2023-11-23 21:30:52,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:30:52,715 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1197 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:52,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 1614 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:30:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12828 states. [2023-11-23 21:30:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12828 to 11265. [2023-11-23 21:30:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11265 states, 8099 states have (on average 1.4930238301024819) internal successors, (12092), 8542 states have internal predecessors, (12092), 2354 states have call successors, (2354), 681 states have call predecessors, (2354), 811 states have return successors, (4053), 2201 states have call predecessors, (4053), 2337 states have call successors, (4053) [2023-11-23 21:30:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11265 states to 11265 states and 18499 transitions. [2023-11-23 21:30:53,782 INFO L78 Accepts]: Start accepts. Automaton has 11265 states and 18499 transitions. Word has length 91 [2023-11-23 21:30:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:53,783 INFO L495 AbstractCegarLoop]: Abstraction has 11265 states and 18499 transitions. [2023-11-23 21:30:53,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-23 21:30:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 11265 states and 18499 transitions. [2023-11-23 21:30:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-23 21:30:53,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:53,790 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:53,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:30:54,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1398670203, now seen corresponding path program 1 times [2023-11-23 21:30:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532393571] [2023-11-23 21:30:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:30:54,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:54,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532393571] [2023-11-23 21:30:54,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532393571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:54,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001052520] [2023-11-23 21:30:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:54,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:54,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:54,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:30:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:55,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1865 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:30:55,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:30:55,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:30:55,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001052520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:55,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:55,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-23 21:30:55,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638259194] [2023-11-23 21:30:55,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:30:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:30:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:30:55,229 INFO L87 Difference]: Start difference. First operand 11265 states and 18499 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 21:30:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:56,356 INFO L93 Difference]: Finished difference Result 21690 states and 36853 transitions. [2023-11-23 21:30:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:30:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2023-11-23 21:30:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:56,447 INFO L225 Difference]: With dead ends: 21690 [2023-11-23 21:30:56,447 INFO L226 Difference]: Without dead ends: 11640 [2023-11-23 21:30:56,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:30:56,521 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:56,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2261 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2023-11-23 21:30:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 11487. [2023-11-23 21:30:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11487 states, 8249 states have (on average 1.4840586737786399) internal successors, (12242), 8725 states have internal predecessors, (12242), 2354 states have call successors, (2354), 681 states have call predecessors, (2354), 883 states have return successors, (4535), 2240 states have call predecessors, (4535), 2337 states have call successors, (4535) [2023-11-23 21:30:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11487 states to 11487 states and 19131 transitions. [2023-11-23 21:30:57,548 INFO L78 Accepts]: Start accepts. Automaton has 11487 states and 19131 transitions. Word has length 111 [2023-11-23 21:30:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:57,548 INFO L495 AbstractCegarLoop]: Abstraction has 11487 states and 19131 transitions. [2023-11-23 21:30:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 21:30:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11487 states and 19131 transitions. [2023-11-23 21:30:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-23 21:30:57,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:57,561 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:30:57,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cd3211f-283d-437e-b928-2cb659216121/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:30:57,785 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:57,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1378221534, now seen corresponding path program 1 times [2023-11-23 21:30:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:57,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701476177] [2023-11-23 21:30:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:57,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat