./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:24:08,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:24:08,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:24:08,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:24:08,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:24:08,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:24:08,558 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:24:08,559 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:24:08,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:24:08,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:24:08,564 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:24:08,565 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:24:08,565 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:24:08,570 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:24:08,570 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:24:08,571 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:24:08,572 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:24:08,573 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:24:08,573 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:24:08,574 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:24:08,574 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:24:08,574 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:24:08,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:24:08,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:24:08,576 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:24:08,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:24:08,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:24:08,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:24:08,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:24:08,578 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:24:08,579 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:24:08,580 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:24:08,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:24:08,580 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:24:08,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:24:08,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:24:08,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:24:08,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:08,581 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:24:08,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:24:08,582 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:24:08,582 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:24:08,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:24:08,583 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:24:08,583 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:24:08,584 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:24:08,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:24:08,584 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_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2023-11-23 21:24:08,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:24:08,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:24:08,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:24:08,930 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:24:08,930 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:24:08,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2023-11-23 21:24:12,140 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:24:12,502 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:24:12,505 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2023-11-23 21:24:12,531 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/data/353c29982/a3149c93b75947528ad76d137df721ca/FLAG553382079 [2023-11-23 21:24:12,548 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/data/353c29982/a3149c93b75947528ad76d137df721ca [2023-11-23 21:24:12,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:24:12,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:24:12,554 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:12,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:24:12,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:24:12,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:12" (1/1) ... [2023-11-23 21:24:12,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a698d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:12, skipping insertion in model container [2023-11-23 21:24:12,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:12" (1/1) ... [2023-11-23 21:24:12,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:24:12,865 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_4ec9b5af-15bc-4147-af86-b22015456b3a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2023-11-23 21:24:13,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:13,405 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:24:13,418 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-23 21:24:13,420 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [57] [2023-11-23 21:24:13,420 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1620] [2023-11-23 21:24:13,421 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1975] [2023-11-23 21:24:13,421 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2066] [2023-11-23 21:24:13,421 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2432] [2023-11-23 21:24:13,422 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2467] [2023-11-23 21:24:13,422 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [2481] [2023-11-23 21:24:13,422 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2517] [2023-11-23 21:24:13,423 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2635] [2023-11-23 21:24:13,426 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_4ec9b5af-15bc-4147-af86-b22015456b3a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2023-11-23 21:24:13,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:24:13,607 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:24:13,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13 WrapperNode [2023-11-23 21:24:13,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:24:13,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:13,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:24:13,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:24:13,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,732 INFO L138 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1094 [2023-11-23 21:24:13,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:24:13,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:24:13,738 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:24:13,738 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:24:13,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,836 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:24:13,847 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:24:13,847 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:24:13,847 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:24:13,848 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (1/1) ... [2023-11-23 21:24:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:24:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:13,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:24:13,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:24:13,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:24:13,989 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 21:24:13,990 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 21:24:13,990 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:24:13,990 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:24:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:24:13,992 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:24:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-23 21:24:13,993 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-23 21:24:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:24:13,993 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:24:13,993 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-23 21:24:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-23 21:24:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:24:13,995 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:24:13,995 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:24:13,998 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:24:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:24:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:24:13,999 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:24:13,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:24:14,000 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:24:14,001 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:24:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:24:14,001 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:24:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 21:24:14,001 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 21:24:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:24:14,002 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:24:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 21:24:14,002 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 21:24:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:24:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:24:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:24:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:24:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:24:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:24:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:24:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:24:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:24:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:24:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:24:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:24:14,005 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:24:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:24:14,005 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:24:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:24:14,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:24:14,006 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:24:14,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:24:14,233 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:24:14,235 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:24:15,590 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:24:16,505 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:24:16,505 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:24:16,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:16 BoogieIcfgContainer [2023-11-23 21:24:16,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:24:16,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:24:16,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:24:16,515 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:24:16,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:12" (1/3) ... [2023-11-23 21:24:16,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd8944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:16, skipping insertion in model container [2023-11-23 21:24:16,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:13" (2/3) ... [2023-11-23 21:24:16,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd8944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:16, skipping insertion in model container [2023-11-23 21:24:16,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:16" (3/3) ... [2023-11-23 21:24:16,521 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2023-11-23 21:24:16,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:24:16,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:24:16,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:24:16,636 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;@1e9cb6cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:24:16,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:24:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-23 21:24:16,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 21:24:16,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:16,666 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] [2023-11-23 21:24:16,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:16,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash -486541264, now seen corresponding path program 1 times [2023-11-23 21:24:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:16,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857994189] [2023-11-23 21:24:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:16,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:24:17,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857994189] [2023-11-23 21:24:17,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857994189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:17,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:17,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:24:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839786860] [2023-11-23 21:24:17,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:17,554 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) 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) [2023-11-23 21:24:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:18,354 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2023-11-23 21:24:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:24:18,357 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 [2023-11-23 21:24:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:18,379 INFO L225 Difference]: With dead ends: 1037 [2023-11-23 21:24:18,379 INFO L226 Difference]: Without dead ends: 685 [2023-11-23 21:24:18,388 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 [2023-11-23 21:24:18,392 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 530 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:18,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 2085 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:24:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-11-23 21:24:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2023-11-23 21:24:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2023-11-23 21:24:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2023-11-23 21:24:18,606 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2023-11-23 21:24:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:18,607 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2023-11-23 21:24:18,608 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) [2023-11-23 21:24:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2023-11-23 21:24:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 21:24:18,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:18,621 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] [2023-11-23 21:24:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:24:18,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:18,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash -588396004, now seen corresponding path program 1 times [2023-11-23 21:24:18,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:18,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144646488] [2023-11-23 21:24:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:24:19,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144646488] [2023-11-23 21:24:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144646488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:19,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:24:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248974239] [2023-11-23 21:24:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:19,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:24:19,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:24:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:24:19,150 INFO L87 Difference]: Start difference. First operand 679 states and 1076 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) [2023-11-23 21:24:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:19,969 INFO L93 Difference]: Finished difference Result 773 states and 1199 transitions. [2023-11-23 21:24:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:24:19,971 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 [2023-11-23 21:24:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:19,988 INFO L225 Difference]: With dead ends: 773 [2023-11-23 21:24:19,988 INFO L226 Difference]: Without dead ends: 771 [2023-11-23 21:24:19,989 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 [2023-11-23 21:24:19,991 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 635 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:19,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1590 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:24:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2023-11-23 21:24:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 764. [2023-11-23 21:24:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2023-11-23 21:24:20,075 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2023-11-23 21:24:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:20,079 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2023-11-23 21:24:20,080 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) [2023-11-23 21:24:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2023-11-23 21:24:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 21:24:20,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:20,088 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] [2023-11-23 21:24:20,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:24:20,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:20,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1924889738, now seen corresponding path program 1 times [2023-11-23 21:24:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129341511] [2023-11-23 21:24:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-23 21:24:20,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:20,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129341511] [2023-11-23 21:24:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129341511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:20,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:24:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408761238] [2023-11-23 21:24:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:20,425 INFO L87 Difference]: Start difference. First operand 764 states and 1189 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) [2023-11-23 21:24:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:20,658 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2023-11-23 21:24:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:20,659 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 [2023-11-23 21:24:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:20,669 INFO L225 Difference]: With dead ends: 1554 [2023-11-23 21:24:20,669 INFO L226 Difference]: Without dead ends: 802 [2023-11-23 21:24:20,679 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 [2023-11-23 21:24:20,683 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 54 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:20,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1521 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2023-11-23 21:24:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2023-11-23 21:24:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2023-11-23 21:24:20,763 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2023-11-23 21:24:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:20,763 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2023-11-23 21:24:20,764 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) [2023-11-23 21:24:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2023-11-23 21:24:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-23 21:24:20,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:20,768 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] [2023-11-23 21:24:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:24:20,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:20,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 475357086, now seen corresponding path program 1 times [2023-11-23 21:24:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865367027] [2023-11-23 21:24:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:20,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:24:21,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865367027] [2023-11-23 21:24:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865367027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709868485] [2023-11-23 21:24:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:21,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:21,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:21,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:24:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:21,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:21,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:24:21,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709868485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:21,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:21,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-23 21:24:21,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424158723] [2023-11-23 21:24:21,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:21,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:21,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:21,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:24:21,484 INFO L87 Difference]: Start difference. First operand 768 states and 1193 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) [2023-11-23 21:24:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:21,807 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2023-11-23 21:24:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:21,808 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 [2023-11-23 21:24:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:21,815 INFO L225 Difference]: With dead ends: 1602 [2023-11-23 21:24:21,815 INFO L226 Difference]: Without dead ends: 846 [2023-11-23 21:24:21,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:24:21,822 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:21,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2023-11-23 21:24:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2023-11-23 21:24:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2023-11-23 21:24:21,880 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2023-11-23 21:24:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:21,881 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2023-11-23 21:24:21,881 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) [2023-11-23 21:24:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2023-11-23 21:24:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 21:24:21,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:21,885 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] [2023-11-23 21:24:21,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:22,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:22,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:22,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1043095615, now seen corresponding path program 1 times [2023-11-23 21:24:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:22,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340594465] [2023-11-23 21:24:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-23 21:24:22,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340594465] [2023-11-23 21:24:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340594465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71364771] [2023-11-23 21:24:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:22,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:22,318 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:22,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:24:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:22,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:22,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 21:24:22,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:22,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71364771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:24:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289622744] [2023-11-23 21:24:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:22,670 INFO L87 Difference]: Start difference. First operand 846 states and 1339 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) [2023-11-23 21:24:22,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:22,991 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2023-11-23 21:24:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:22,992 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 [2023-11-23 21:24:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:23,000 INFO L225 Difference]: With dead ends: 1758 [2023-11-23 21:24:23,000 INFO L226 Difference]: Without dead ends: 924 [2023-11-23 21:24:23,006 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 [2023-11-23 21:24:23,007 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:23,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2023-11-23 21:24:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2023-11-23 21:24:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2023-11-23 21:24:23,070 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2023-11-23 21:24:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2023-11-23 21:24:23,071 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) [2023-11-23 21:24:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2023-11-23 21:24:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-23 21:24:23,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:23,076 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] [2023-11-23 21:24:23,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:23,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:23,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:23,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2015187633, now seen corresponding path program 1 times [2023-11-23 21:24:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234158663] [2023-11-23 21:24:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:23,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:24:23,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234158663] [2023-11-23 21:24:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234158663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:23,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411985582] [2023-11-23 21:24:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:23,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:23,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:23,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:23,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:24:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:23,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:23,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:24:23,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411985582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:23,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:24:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67593962] [2023-11-23 21:24:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:23,907 INFO L87 Difference]: Start difference. First operand 924 states and 1485 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) [2023-11-23 21:24:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:24,266 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2023-11-23 21:24:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:24,266 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 [2023-11-23 21:24:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:24,276 INFO L225 Difference]: With dead ends: 1914 [2023-11-23 21:24:24,276 INFO L226 Difference]: Without dead ends: 1002 [2023-11-23 21:24:24,282 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 [2023-11-23 21:24:24,283 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:24,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2023-11-23 21:24:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2023-11-23 21:24:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2023-11-23 21:24:24,385 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2023-11-23 21:24:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:24,386 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2023-11-23 21:24:24,387 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) [2023-11-23 21:24:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2023-11-23 21:24:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 21:24:24,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:24,396 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] [2023-11-23 21:24:24,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:24:24,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:24,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 43420990, now seen corresponding path program 1 times [2023-11-23 21:24:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079395470] [2023-11-23 21:24:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 21:24:24,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079395470] [2023-11-23 21:24:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079395470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:24,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400156871] [2023-11-23 21:24:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:24,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:24,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:24:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:25,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:24:25,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:24:25,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:24:25,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400156871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:25,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:24:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:24:25,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189854751] [2023-11-23 21:24:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:25,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:25,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:24:25,214 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 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) [2023-11-23 21:24:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:25,591 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2023-11-23 21:24:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:24:25,592 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 [2023-11-23 21:24:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:25,602 INFO L225 Difference]: With dead ends: 2070 [2023-11-23 21:24:25,602 INFO L226 Difference]: Without dead ends: 1080 [2023-11-23 21:24:25,609 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 [2023-11-23 21:24:25,610 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:25,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:24:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2023-11-23 21:24:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2023-11-23 21:24:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2023-11-23 21:24:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2023-11-23 21:24:25,675 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2023-11-23 21:24:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:25,676 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2023-11-23 21:24:25,676 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) [2023-11-23 21:24:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2023-11-23 21:24:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-23 21:24:25,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:25,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:24:25,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:24:25,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:24:25,897 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:25,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1237507852, now seen corresponding path program 1 times [2023-11-23 21:24:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:25,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547115898] [2023-11-23 21:24:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 21:24:26,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547115898] [2023-11-23 21:24:26,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547115898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673435195] [2023-11-23 21:24:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:26,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:26,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:26,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ec9b5af-15bc-4147-af86-b22015456b3a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:24:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:26,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 21:24:26,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 21:24:28,311 INFO L327 TraceCheckSpWp]: Computing backward predicates...