./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:04:37,381 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:04:37,490 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:04:37,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:04:37,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:04:37,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:04:37,535 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:04:37,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:04:37,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:04:37,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:04:37,542 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:04:37,543 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:04:37,544 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:04:37,545 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:04:37,546 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:04:37,546 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:04:37,546 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:04:37,547 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:04:37,547 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:04:37,548 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:04:37,548 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:04:37,549 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:04:37,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:04:37,550 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:04:37,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:04:37,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:04:37,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:04:37,552 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:04:37,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:04:37,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:04:37,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:04:37,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:04:37,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:04:37,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:04:37,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:04:37,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:04:37,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:04:37,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:04:37,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:04:37,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:04:37,557 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:04:37,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:04:37,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:04:37,558 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:04:37,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:04:37,558 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_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2023-11-19 05:04:37,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:04:37,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:04:37,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:04:37,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:04:37,856 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:04:37,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2023-11-19 05:04:41,068 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:04:41,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:04:41,505 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2023-11-19 05:04:41,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/data/8f131de9f/861549d05e854f61a413f88611e67384/FLAGeb10e99df [2023-11-19 05:04:41,541 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/data/8f131de9f/861549d05e854f61a413f88611e67384 [2023-11-19 05:04:41,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:04:41,545 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:04:41,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:04:41,548 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:04:41,554 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:04:41,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:41" (1/1) ... [2023-11-19 05:04:41,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222f5d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:41, skipping insertion in model container [2023-11-19 05:04:41,556 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:04:41" (1/1) ... [2023-11-19 05:04:41,640 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:04:41,908 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_5cb2b5d1-4fb9-447a-b465-f065a49f958d/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2023-11-19 05:04:42,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:04:42,394 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:04:42,407 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-11-19 05:04:42,409 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [86] [2023-11-19 05:04:42,409 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [186] [2023-11-19 05:04:42,410 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [195] [2023-11-19 05:04:42,410 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [315] [2023-11-19 05:04:42,410 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [355] [2023-11-19 05:04:42,411 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [705] [2023-11-19 05:04:42,412 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1071] [2023-11-19 05:04:42,412 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1738] [2023-11-19 05:04:42,413 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3255] [2023-11-19 05:04:42,433 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_5cb2b5d1-4fb9-447a-b465-f065a49f958d/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2023-11-19 05:04:42,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:04:42,628 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:04:42,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42 WrapperNode [2023-11-19 05:04:42,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:04:42,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:04:42,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:04:42,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:04:42,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,679 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,755 INFO L138 Inliner]: procedures = 90, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1060 [2023-11-19 05:04:42,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:04:42,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:04:42,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:04:42,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:04:42,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,834 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,920 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:04:42,952 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:04:42,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:04:42,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:04:42,954 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (1/1) ... [2023-11-19 05:04:42,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:04:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:42,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:04:43,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:04:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:04:43,056 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:04:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:04:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:04:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:04:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 05:04:43,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 05:04:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:04:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:04:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-19 05:04:43,059 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-19 05:04:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:04:43,059 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:04:43,060 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:04:43,061 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:04:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:04:43,062 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:04:43,062 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:04:43,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:04:43,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:04:43,065 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:04:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:04:43,066 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:04:43,066 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:04:43,067 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:04:43,067 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:04:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:04:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-19 05:04:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-19 05:04:43,068 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:04:43,068 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:04:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:04:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:04:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:04:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:04:43,069 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:04:43,069 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:04:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:04:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:04:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:04:43,070 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:04:43,070 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:04:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:04:43,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:04:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:04:43,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:04:43,071 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:04:43,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:04:43,259 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:04:43,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:04:44,601 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:04:45,512 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:04:45,512 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:04:45,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:45 BoogieIcfgContainer [2023-11-19 05:04:45,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:04:45,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:04:45,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:04:45,527 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:04:45,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:04:41" (1/3) ... [2023-11-19 05:04:45,528 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd84baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:45, skipping insertion in model container [2023-11-19 05:04:45,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:04:42" (2/3) ... [2023-11-19 05:04:45,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd84baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:04:45, skipping insertion in model container [2023-11-19 05:04:45,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:04:45" (3/3) ... [2023-11-19 05:04:45,530 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2023-11-19 05:04:45,551 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:04:45,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:04:45,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:04:45,623 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;@16c46aeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:04:45,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:04:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-19 05:04:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:04:45,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:45,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:45,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:45,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1397100830, now seen corresponding path program 1 times [2023-11-19 05:04:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44089978] [2023-11-19 05:04:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:04:46,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44089978] [2023-11-19 05:04:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44089978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:46,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:46,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:04:46,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699047624] [2023-11-19 05:04:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:04:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:04:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:46,567 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:04:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:47,436 INFO L93 Difference]: Finished difference Result 1019 states and 1636 transitions. [2023-11-19 05:04:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:04:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2023-11-19 05:04:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:47,461 INFO L225 Difference]: With dead ends: 1019 [2023-11-19 05:04:47,462 INFO L226 Difference]: Without dead ends: 673 [2023-11-19 05:04:47,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:47,475 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 523 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:47,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 2073 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:04:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-19 05:04:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2023-11-19 05:04:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 449 states have (on average 1.5679287305122493) internal successors, (704), 478 states have internal predecessors, (704), 176 states have call successors, (176), 43 states have call predecessors, (176), 41 states have return successors, (182), 170 states have call predecessors, (182), 174 states have call successors, (182) [2023-11-19 05:04:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1062 transitions. [2023-11-19 05:04:47,615 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1062 transitions. Word has length 73 [2023-11-19 05:04:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1062 transitions. [2023-11-19 05:04:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:04:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1062 transitions. [2023-11-19 05:04:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 05:04:47,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:47,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:04:47,631 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:47,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 575897435, now seen corresponding path program 1 times [2023-11-19 05:04:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927675877] [2023-11-19 05:04:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:04:48,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:48,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927675877] [2023-11-19 05:04:48,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927675877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:48,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:48,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:04:48,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667312297] [2023-11-19 05:04:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:04:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:04:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:48,285 INFO L87 Difference]: Start difference. First operand 667 states and 1062 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:04:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:49,017 INFO L93 Difference]: Finished difference Result 761 states and 1185 transitions. [2023-11-19 05:04:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:04:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2023-11-19 05:04:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:49,026 INFO L225 Difference]: With dead ends: 761 [2023-11-19 05:04:49,026 INFO L226 Difference]: Without dead ends: 759 [2023-11-19 05:04:49,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:49,029 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 628 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:49,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1582 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:04:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-11-19 05:04:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 752. [2023-11-19 05:04:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 500 states have (on average 1.534) internal successors, (767), 529 states have internal predecessors, (767), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1175 transitions. [2023-11-19 05:04:49,176 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1175 transitions. Word has length 77 [2023-11-19 05:04:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:49,177 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1175 transitions. [2023-11-19 05:04:49,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-19 05:04:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1175 transitions. [2023-11-19 05:04:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 05:04:49,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:49,184 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:49,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:04:49,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:49,185 INFO L85 PathProgramCache]: Analyzing trace with hash -470779330, now seen corresponding path program 1 times [2023-11-19 05:04:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93514473] [2023-11-19 05:04:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-19 05:04:49,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:49,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93514473] [2023-11-19 05:04:49,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93514473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:49,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:49,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:04:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443021523] [2023-11-19 05:04:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:49,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:49,413 INFO L87 Difference]: Start difference. First operand 752 states and 1175 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:04:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:49,647 INFO L93 Difference]: Finished difference Result 1530 states and 2419 transitions. [2023-11-19 05:04:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2023-11-19 05:04:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:49,655 INFO L225 Difference]: With dead ends: 1530 [2023-11-19 05:04:49,655 INFO L226 Difference]: Without dead ends: 790 [2023-11-19 05:04:49,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:49,663 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 54 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:49,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1509 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:04:49,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2023-11-19 05:04:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2023-11-19 05:04:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 504 states have (on average 1.5297619047619047) internal successors, (771), 533 states have internal predecessors, (771), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1179 transitions. [2023-11-19 05:04:49,728 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1179 transitions. Word has length 108 [2023-11-19 05:04:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:49,728 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1179 transitions. [2023-11-19 05:04:49,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:04:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1179 transitions. [2023-11-19 05:04:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-19 05:04:49,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:49,734 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2023-11-19 05:04:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:04:49,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash -673459247, now seen corresponding path program 1 times [2023-11-19 05:04:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530619043] [2023-11-19 05:04:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 05:04:49,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530619043] [2023-11-19 05:04:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530619043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:49,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193364855] [2023-11-19 05:04:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:49,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:49,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:04:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:50,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:50,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:04:50,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193364855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:04:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295423816] [2023-11-19 05:04:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:50,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:50,397 INFO L87 Difference]: Start difference. First operand 756 states and 1179 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:50,746 INFO L93 Difference]: Finished difference Result 1578 states and 2508 transitions. [2023-11-19 05:04:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2023-11-19 05:04:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:50,785 INFO L225 Difference]: With dead ends: 1578 [2023-11-19 05:04:50,787 INFO L226 Difference]: Without dead ends: 834 [2023-11-19 05:04:50,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:50,803 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:50,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:04:50,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-11-19 05:04:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2023-11-19 05:04:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 580 states have (on average 1.5810344827586207) internal successors, (917), 609 states have internal predecessors, (917), 198 states have call successors, (198), 58 states have call predecessors, (198), 55 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1325 transitions. [2023-11-19 05:04:50,867 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1325 transitions. Word has length 111 [2023-11-19 05:04:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:50,868 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1325 transitions. [2023-11-19 05:04:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1325 transitions. [2023-11-19 05:04:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-19 05:04:50,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:50,875 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:50,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:51,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:51,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:51,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1282781446, now seen corresponding path program 1 times [2023-11-19 05:04:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:51,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658325171] [2023-11-19 05:04:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:51,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-19 05:04:51,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658325171] [2023-11-19 05:04:51,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658325171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:51,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287168047] [2023-11-19 05:04:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:51,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:51,307 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:51,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:04:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:51,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:51,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:04:51,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:51,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287168047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:51,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:51,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:04:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856728298] [2023-11-19 05:04:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:51,659 INFO L87 Difference]: Start difference. First operand 834 states and 1325 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:52,100 INFO L93 Difference]: Finished difference Result 1734 states and 2798 transitions. [2023-11-19 05:04:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:52,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2023-11-19 05:04:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:52,113 INFO L225 Difference]: With dead ends: 1734 [2023-11-19 05:04:52,114 INFO L226 Difference]: Without dead ends: 912 [2023-11-19 05:04:52,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:52,124 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:52,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:04:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2023-11-19 05:04:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2023-11-19 05:04:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 656 states have (on average 1.6204268292682926) internal successors, (1063), 685 states have internal predecessors, (1063), 198 states have call successors, (198), 60 states have call predecessors, (198), 57 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1471 transitions. [2023-11-19 05:04:52,201 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1471 transitions. Word has length 116 [2023-11-19 05:04:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:52,202 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1471 transitions. [2023-11-19 05:04:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1471 transitions. [2023-11-19 05:04:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-19 05:04:52,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:52,208 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2023-11-19 05:04:52,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:52,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:52,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash -346293898, now seen corresponding path program 1 times [2023-11-19 05:04:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:52,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798492681] [2023-11-19 05:04:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-19 05:04:52,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798492681] [2023-11-19 05:04:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798492681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295967397] [2023-11-19 05:04:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:52,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:52,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:04:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:53,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:53,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:04:53,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:53,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295967397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:04:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190958671] [2023-11-19 05:04:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:53,108 INFO L87 Difference]: Start difference. First operand 912 states and 1471 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:53,504 INFO L93 Difference]: Finished difference Result 1890 states and 3088 transitions. [2023-11-19 05:04:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2023-11-19 05:04:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:53,514 INFO L225 Difference]: With dead ends: 1890 [2023-11-19 05:04:53,515 INFO L226 Difference]: Without dead ends: 990 [2023-11-19 05:04:53,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:53,523 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:53,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:04:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-19 05:04:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2023-11-19 05:04:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 732 states have (on average 1.651639344262295) internal successors, (1209), 761 states have internal predecessors, (1209), 198 states have call successors, (198), 62 states have call predecessors, (198), 59 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1617 transitions. [2023-11-19 05:04:53,588 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1617 transitions. Word has length 120 [2023-11-19 05:04:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:53,589 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1617 transitions. [2023-11-19 05:04:53,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1617 transitions. [2023-11-19 05:04:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-19 05:04:53,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:53,596 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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] [2023-11-19 05:04:53,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:04:53,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:53,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 869103601, now seen corresponding path program 1 times [2023-11-19 05:04:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911605326] [2023-11-19 05:04:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-19 05:04:54,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911605326] [2023-11-19 05:04:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911605326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972052876] [2023-11-19 05:04:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:54,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:54,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:04:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:54,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:04:54,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:04:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:04:54,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:04:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972052876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:54,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:04:54,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:04:54,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028460289] [2023-11-19 05:04:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:54,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:54,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:54,388 INFO L87 Difference]: Start difference. First operand 990 states and 1617 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:54,744 INFO L93 Difference]: Finished difference Result 2046 states and 3378 transitions. [2023-11-19 05:04:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2023-11-19 05:04:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:54,759 INFO L225 Difference]: With dead ends: 2046 [2023-11-19 05:04:54,760 INFO L226 Difference]: Without dead ends: 1068 [2023-11-19 05:04:54,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:04:54,769 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:54,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:04:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2023-11-19 05:04:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2023-11-19 05:04:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 808 states have (on average 1.676980198019802) internal successors, (1355), 837 states have internal predecessors, (1355), 198 states have call successors, (198), 64 states have call predecessors, (198), 61 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1763 transitions. [2023-11-19 05:04:54,831 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1763 transitions. Word has length 123 [2023-11-19 05:04:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:54,832 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1763 transitions. [2023-11-19 05:04:54,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:04:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1763 transitions. [2023-11-19 05:04:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:04:54,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:54,837 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:54,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:04:55,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:55,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1005568289, now seen corresponding path program 1 times [2023-11-19 05:04:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:55,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596039359] [2023-11-19 05:04:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-19 05:04:55,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:55,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596039359] [2023-11-19 05:04:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596039359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:04:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705308537] [2023-11-19 05:04:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:04:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:04:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:04:55,260 INFO L87 Difference]: Start difference. First operand 1068 states and 1763 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 05:04:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:55,599 INFO L93 Difference]: Finished difference Result 2208 states and 3666 transitions. [2023-11-19 05:04:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:04:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2023-11-19 05:04:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:55,610 INFO L225 Difference]: With dead ends: 2208 [2023-11-19 05:04:55,610 INFO L226 Difference]: Without dead ends: 1136 [2023-11-19 05:04:55,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:04:55,617 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:55,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:04:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-11-19 05:04:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-11-19 05:04:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 874 states have (on average 1.591533180778032) internal successors, (1391), 903 states have internal predecessors, (1391), 198 states have call successors, (198), 66 states have call predecessors, (198), 63 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2023-11-19 05:04:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1799 transitions. [2023-11-19 05:04:55,701 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1799 transitions. Word has length 125 [2023-11-19 05:04:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1799 transitions. [2023-11-19 05:04:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-19 05:04:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1799 transitions. [2023-11-19 05:04:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:04:55,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:55,707 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:55,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:04:55,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:55,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -517088176, now seen corresponding path program 1 times [2023-11-19 05:04:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:55,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982595006] [2023-11-19 05:04:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-19 05:04:56,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:56,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982595006] [2023-11-19 05:04:56,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982595006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:04:56,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:04:56,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:04:56,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081678822] [2023-11-19 05:04:56,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:04:56,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:04:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:04:56,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:04:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:04:56,032 INFO L87 Difference]: Start difference. First operand 1136 states and 1799 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:04:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:04:56,749 INFO L93 Difference]: Finished difference Result 2331 states and 3678 transitions. [2023-11-19 05:04:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:04:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 125 [2023-11-19 05:04:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:04:56,759 INFO L225 Difference]: With dead ends: 2331 [2023-11-19 05:04:56,760 INFO L226 Difference]: Without dead ends: 1024 [2023-11-19 05:04:56,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:04:56,769 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 654 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:04:56,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 2373 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:04:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2023-11-19 05:04:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1002. [2023-11-19 05:04:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 724 states have (on average 1.5) internal successors, (1086), 755 states have internal predecessors, (1086), 207 states have call successors, (207), 74 states have call predecessors, (207), 70 states have return successors, (224), 196 states have call predecessors, (224), 204 states have call successors, (224) [2023-11-19 05:04:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1517 transitions. [2023-11-19 05:04:56,852 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1517 transitions. Word has length 125 [2023-11-19 05:04:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:04:56,852 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1517 transitions. [2023-11-19 05:04:56,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:04:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1517 transitions. [2023-11-19 05:04:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-19 05:04:56,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:04:56,858 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:04:56,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:04:56,859 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:04:56,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:04:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1144057946, now seen corresponding path program 1 times [2023-11-19 05:04:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:04:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602341488] [2023-11-19 05:04:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:04:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-19 05:04:58,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:04:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602341488] [2023-11-19 05:04:58,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602341488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:04:58,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211576537] [2023-11-19 05:04:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:04:58,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:04:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:04:58,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:04:58,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cb2b5d1-4fb9-447a-b465-f065a49f958d/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:04:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:04:59,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 05:04:59,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:05:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-19 05:05:00,802 INFO L327 TraceCheckSpWp]: Computing backward predicates...