./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2 --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 f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:31:32,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:31:32,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:31:32,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:31:32,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:31:32,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:31:32,524 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:31:32,524 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:31:32,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:31:32,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:31:32,526 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:31:32,527 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:31:32,527 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:31:32,527 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:31:32,528 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:31:32,528 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:31:32,529 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:31:32,534 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:31:32,534 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:31:32,534 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:31:32,535 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:31:32,535 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:31:32,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:31:32,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:31:32,536 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:31:32,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:31:32,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:31:32,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:31:32,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:31:32,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:31:32,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:31:32,539 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:31:32,539 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:31:32,540 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:31:32,540 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:31:32,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:31:32,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:31:32,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:31:32,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:32,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:31:32,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:31:32,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:31:32,543 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:31:32,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:31:32,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:31:32,545 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:31:32,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:31:32,545 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_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2024-11-02 12:31:32,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:31:32,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:31:32,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:31:32,917 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:31:32,918 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:31:32,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c Unable to find full path for "g++" [2024-11-02 12:31:34,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:31:35,317 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:31:35,318 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2024-11-02 12:31:35,344 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/data/a59387470/4eb70cb699f94050afe927450704992d/FLAGbfff5ea6b [2024-11-02 12:31:35,367 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/data/a59387470/4eb70cb699f94050afe927450704992d [2024-11-02 12:31:35,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:31:35,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:31:35,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:35,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:31:35,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:31:35,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:35" (1/1) ... [2024-11-02 12:31:35,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f4b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:35, skipping insertion in model container [2024-11-02 12:31:35,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:35" (1/1) ... [2024-11-02 12:31:35,478 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:31:36,218 WARN L251 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_b069df81-f9b8-47ee-919c-1191ffce3709/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2024-11-02 12:31:36,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:36,243 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:31:36,253 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2024-11-02 12:31:36,255 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [414] [2024-11-02 12:31:36,255 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [517] [2024-11-02 12:31:36,256 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [558] [2024-11-02 12:31:36,256 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [911] [2024-11-02 12:31:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [946] [2024-11-02 12:31:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [960] [2024-11-02 12:31:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1627] [2024-11-02 12:31:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3197] [2024-11-02 12:31:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3315] [2024-11-02 12:31:36,460 WARN L251 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_b069df81-f9b8-47ee-919c-1191ffce3709/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2024-11-02 12:31:36,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:36,501 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:31:36,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36 WrapperNode [2024-11-02 12:31:36,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:36,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:36,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:31:36,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:31:36,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,610 INFO L138 Inliner]: procedures = 93, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1059 [2024-11-02 12:31:36,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:36,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:31:36,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:31:36,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:31:36,623 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:31:36,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:31:36,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:31:36,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:31:36,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (1/1) ... [2024-11-02 12:31:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:36,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:31:36,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:31:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:31:36,797 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-02 12:31:36,798 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-02 12:31:36,798 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2024-11-02 12:31:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2024-11-02 12:31:36,799 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2024-11-02 12:31:36,799 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2024-11-02 12:31:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-02 12:31:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-02 12:31:36,800 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-02 12:31:36,800 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-02 12:31:36,801 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-02 12:31:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-02 12:31:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-02 12:31:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-02 12:31:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-02 12:31:36,802 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-02 12:31:36,802 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:31:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:31:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:31:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:31:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2024-11-02 12:31:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2024-11-02 12:31:36,803 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-02 12:31:36,803 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-02 12:31:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-02 12:31:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-02 12:31:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-02 12:31:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-02 12:31:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-02 12:31:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-02 12:31:36,804 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-02 12:31:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-02 12:31:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-02 12:31:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-02 12:31:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-02 12:31:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-02 12:31:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-02 12:31:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-02 12:31:36,805 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-02 12:31:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-02 12:31:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:31:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-02 12:31:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-02 12:31:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-02 12:31:36,808 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-02 12:31:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-02 12:31:36,809 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-02 12:31:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:31:36,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:31:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-02 12:31:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-02 12:31:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2024-11-02 12:31:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2024-11-02 12:31:37,014 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:31:37,018 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:31:38,549 INFO L? ?]: Removed 441 outVars from TransFormulas that were not future-live. [2024-11-02 12:31:38,550 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:31:39,645 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:31:39,646 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:31:39,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:31:39 BoogieIcfgContainer [2024-11-02 12:31:39,647 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:31:39,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:31:39,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:31:39,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:31:39,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:31:35" (1/3) ... [2024-11-02 12:31:39,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fccf7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:31:39, skipping insertion in model container [2024-11-02 12:31:39,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:36" (2/3) ... [2024-11-02 12:31:39,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fccf7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:31:39, skipping insertion in model container [2024-11-02 12:31:39,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:31:39" (3/3) ... [2024-11-02 12:31:39,660 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2024-11-02 12:31:39,679 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:31:39,680 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:31:39,772 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:31:39,780 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@568174be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:31:39,781 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:31:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-02 12:31:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 12:31:39,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:39,801 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:39,802 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:39,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 457993430, now seen corresponding path program 1 times [2024-11-02 12:31:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870065917] [2024-11-02 12:31:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:31:40,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870065917] [2024-11-02 12:31:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870065917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:31:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:31:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968950334] [2024-11-02 12:31:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:40,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:31:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:31:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:31:40,919 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 12:31:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:41,450 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2024-11-02 12:31:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:31:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2024-11-02 12:31:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:41,474 INFO L225 Difference]: With dead ends: 1074 [2024-11-02 12:31:41,474 INFO L226 Difference]: Without dead ends: 709 [2024-11-02 12:31:41,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:31:41,493 INFO L432 NwaCegarLoop]: 603 mSDtfsCounter, 546 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:41,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1110 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:31:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2024-11-02 12:31:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2024-11-02 12:31:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2024-11-02 12:31:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2024-11-02 12:31:41,696 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2024-11-02 12:31:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:41,699 INFO L471 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2024-11-02 12:31:41,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 12:31:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2024-11-02 12:31:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-02 12:31:41,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:41,715 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:41,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:31:41,716 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:41,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 775886497, now seen corresponding path program 1 times [2024-11-02 12:31:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:41,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130850667] [2024-11-02 12:31:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 12:31:42,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:42,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130850667] [2024-11-02 12:31:42,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130850667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:42,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710189958] [2024-11-02 12:31:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:42,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:42,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:31:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:42,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:31:42,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 12:31:42,885 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:31:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710189958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:31:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-02 12:31:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397778056] [2024-11-02 12:31:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:42,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:31:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:31:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:31:42,891 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-02 12:31:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:43,879 INFO L93 Difference]: Finished difference Result 1524 states and 2396 transitions. [2024-11-02 12:31:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:31:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2024-11-02 12:31:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:43,889 INFO L225 Difference]: With dead ends: 1524 [2024-11-02 12:31:43,889 INFO L226 Difference]: Without dead ends: 862 [2024-11-02 12:31:43,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:31:43,896 INFO L432 NwaCegarLoop]: 605 mSDtfsCounter, 350 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 2301 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:43,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 2301 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:31:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2024-11-02 12:31:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 852. [2024-11-02 12:31:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 567 states have (on average 1.5044091710758378) internal successors, (853), 594 states have internal predecessors, (853), 219 states have call successors, (219), 69 states have call predecessors, (219), 65 states have return successors, (249), 202 states have call predecessors, (249), 215 states have call successors, (249) [2024-11-02 12:31:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1321 transitions. [2024-11-02 12:31:43,994 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1321 transitions. Word has length 86 [2024-11-02 12:31:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:43,995 INFO L471 AbstractCegarLoop]: Abstraction has 852 states and 1321 transitions. [2024-11-02 12:31:43,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-02 12:31:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1321 transitions. [2024-11-02 12:31:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-02 12:31:44,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:44,003 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:44,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:31:44,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:44,204 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:44,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:44,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1609639596, now seen corresponding path program 1 times [2024-11-02 12:31:44,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:44,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870895079] [2024-11-02 12:31:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:44,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-02 12:31:44,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:44,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870895079] [2024-11-02 12:31:44,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870895079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:44,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:31:44,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-02 12:31:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672415217] [2024-11-02 12:31:44,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:44,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:31:44,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:31:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:31:44,738 INFO L87 Difference]: Start difference. First operand 852 states and 1321 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-02 12:31:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:47,833 INFO L93 Difference]: Finished difference Result 2611 states and 4101 transitions. [2024-11-02 12:31:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:31:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2024-11-02 12:31:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:47,848 INFO L225 Difference]: With dead ends: 2611 [2024-11-02 12:31:47,848 INFO L226 Difference]: Without dead ends: 1772 [2024-11-02 12:31:47,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:31:47,855 INFO L432 NwaCegarLoop]: 307 mSDtfsCounter, 1092 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:47,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1233 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2327 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-02 12:31:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2024-11-02 12:31:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1564. [2024-11-02 12:31:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1055 states have (on average 1.523222748815166) internal successors, (1607), 1105 states have internal predecessors, (1607), 388 states have call successors, (388), 121 states have call predecessors, (388), 120 states have return successors, (456), 363 states have call predecessors, (456), 382 states have call successors, (456) [2024-11-02 12:31:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2451 transitions. [2024-11-02 12:31:48,035 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2451 transitions. Word has length 87 [2024-11-02 12:31:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:48,035 INFO L471 AbstractCegarLoop]: Abstraction has 1564 states and 2451 transitions. [2024-11-02 12:31:48,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-02 12:31:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2451 transitions. [2024-11-02 12:31:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-02 12:31:48,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:48,040 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:48,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:31:48,040 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:48,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1593901329, now seen corresponding path program 1 times [2024-11-02 12:31:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:48,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535689115] [2024-11-02 12:31:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 12:31:48,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:48,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535689115] [2024-11-02 12:31:48,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535689115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:48,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:31:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-02 12:31:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756106027] [2024-11-02 12:31:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:48,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:31:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:31:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:31:48,537 INFO L87 Difference]: Start difference. First operand 1564 states and 2451 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-02 12:31:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:51,988 INFO L93 Difference]: Finished difference Result 1990 states and 3135 transitions. [2024-11-02 12:31:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:31:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2024-11-02 12:31:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:52,011 INFO L225 Difference]: With dead ends: 1990 [2024-11-02 12:31:52,013 INFO L226 Difference]: Without dead ends: 1988 [2024-11-02 12:31:52,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:31:52,016 INFO L432 NwaCegarLoop]: 441 mSDtfsCounter, 1376 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 2950 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1398 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 2950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:52,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1398 Valid, 1989 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 2950 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-02 12:31:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2024-11-02 12:31:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1780. [2024-11-02 12:31:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2024-11-02 12:31:52,248 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 91 [2024-11-02 12:31:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:52,249 INFO L471 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2024-11-02 12:31:52,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-02 12:31:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2024-11-02 12:31:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-02 12:31:52,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:52,256 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:52,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:31:52,256 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:52,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash 592883334, now seen corresponding path program 1 times [2024-11-02 12:31:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119905607] [2024-11-02 12:31:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:52,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-02 12:31:52,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:52,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119905607] [2024-11-02 12:31:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119905607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:52,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:31:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:31:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204373226] [2024-11-02 12:31:52,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:52,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:31:52,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:31:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:31:52,524 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:31:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:52,814 INFO L93 Difference]: Finished difference Result 3560 states and 5620 transitions. [2024-11-02 12:31:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:31:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2024-11-02 12:31:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:52,833 INFO L225 Difference]: With dead ends: 3560 [2024-11-02 12:31:52,833 INFO L226 Difference]: Without dead ends: 1792 [2024-11-02 12:31:52,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:31:52,850 INFO L432 NwaCegarLoop]: 527 mSDtfsCounter, 0 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:52,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1575 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:31:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2024-11-02 12:31:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1792. [2024-11-02 12:31:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2024-11-02 12:31:53,046 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2024-11-02 12:31:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:53,047 INFO L471 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2024-11-02 12:31:53,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:31:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2024-11-02 12:31:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-02 12:31:53,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:53,052 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:53,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:31:53,053 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:53,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2069481618, now seen corresponding path program 1 times [2024-11-02 12:31:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:53,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142681091] [2024-11-02 12:31:53,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:53,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-02 12:31:53,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142681091] [2024-11-02 12:31:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142681091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769350766] [2024-11-02 12:31:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:53,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:53,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:53,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:31:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:53,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:31:53,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 12:31:53,949 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:31:53,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769350766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:53,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:31:53,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-02 12:31:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386671278] [2024-11-02 12:31:53,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:53,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:31:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:31:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:31:53,955 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:54,488 INFO L93 Difference]: Finished difference Result 3752 states and 6000 transitions. [2024-11-02 12:31:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:31:54,489 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2024-11-02 12:31:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:54,510 INFO L225 Difference]: With dead ends: 3752 [2024-11-02 12:31:54,511 INFO L226 Difference]: Without dead ends: 1972 [2024-11-02 12:31:54,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:31:54,525 INFO L432 NwaCegarLoop]: 467 mSDtfsCounter, 144 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:54,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1378 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:31:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2024-11-02 12:31:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1948. [2024-11-02 12:31:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2024-11-02 12:31:54,693 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2024-11-02 12:31:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:54,694 INFO L471 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2024-11-02 12:31:54,694 INFO L472 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, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2024-11-02 12:31:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-02 12:31:54,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:54,703 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:54,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:31:54,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 12:31:54,910 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:54,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 550158902, now seen corresponding path program 1 times [2024-11-02 12:31:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757082988] [2024-11-02 12:31:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-02 12:31:55,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757082988] [2024-11-02 12:31:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757082988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:55,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375636914] [2024-11-02 12:31:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:55,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:55,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:55,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:31:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:55,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:31:55,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-02 12:31:55,775 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:31:55,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375636914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:55,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:31:55,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 12:31:55,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108148459] [2024-11-02 12:31:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:55,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:31:55,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:55,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:31:55,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:31:55,777 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:56,321 INFO L93 Difference]: Finished difference Result 4076 states and 6586 transitions. [2024-11-02 12:31:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:31:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2024-11-02 12:31:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:56,339 INFO L225 Difference]: With dead ends: 4076 [2024-11-02 12:31:56,339 INFO L226 Difference]: Without dead ends: 2140 [2024-11-02 12:31:56,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:31:56,352 INFO L432 NwaCegarLoop]: 466 mSDtfsCounter, 142 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:56,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1375 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:31:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2024-11-02 12:31:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2104. [2024-11-02 12:31:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2024-11-02 12:31:56,512 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2024-11-02 12:31:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:56,513 INFO L471 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2024-11-02 12:31:56,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2024-11-02 12:31:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-02 12:31:56,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:56,520 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:56,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:31:56,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:31:56,724 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1912232730, now seen corresponding path program 1 times [2024-11-02 12:31:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330660350] [2024-11-02 12:31:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-02 12:31:56,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330660350] [2024-11-02 12:31:56,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330660350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465258839] [2024-11-02 12:31:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:56,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:56,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:56,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:31:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:57,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:31:57,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-02 12:31:57,481 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:31:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465258839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:57,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:31:57,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 12:31:57,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29016668] [2024-11-02 12:31:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:57,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:31:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:31:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:31:57,483 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:58,036 INFO L93 Difference]: Finished difference Result 4400 states and 7172 transitions. [2024-11-02 12:31:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:31:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2024-11-02 12:31:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:58,054 INFO L225 Difference]: With dead ends: 4400 [2024-11-02 12:31:58,054 INFO L226 Difference]: Without dead ends: 2308 [2024-11-02 12:31:58,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:31:58,066 INFO L432 NwaCegarLoop]: 465 mSDtfsCounter, 140 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:58,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1372 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:31:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2024-11-02 12:31:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2260. [2024-11-02 12:31:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2024-11-02 12:31:58,223 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2024-11-02 12:31:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:58,225 INFO L471 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2024-11-02 12:31:58,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2024-11-02 12:31:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-02 12:31:58,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:58,232 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:58,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:31:58,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-02 12:31:58,433 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:31:58,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:31:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 140240206, now seen corresponding path program 1 times [2024-11-02 12:31:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:31:58,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208642723] [2024-11-02 12:31:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:58,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:31:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-02 12:31:58,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:31:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208642723] [2024-11-02 12:31:58,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208642723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:31:58,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400731943] [2024-11-02 12:31:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:31:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:31:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:58,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:31:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:31:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:31:59,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:31:59,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:31:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-02 12:31:59,146 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:31:59,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400731943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:31:59,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:31:59,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-02 12:31:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614590646] [2024-11-02 12:31:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:31:59,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:31:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:31:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:31:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:31:59,148 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:59,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:31:59,649 INFO L93 Difference]: Finished difference Result 4724 states and 7758 transitions. [2024-11-02 12:31:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:31:59,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2024-11-02 12:31:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:31:59,668 INFO L225 Difference]: With dead ends: 4724 [2024-11-02 12:31:59,668 INFO L226 Difference]: Without dead ends: 2476 [2024-11-02 12:31:59,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:31:59,682 INFO L432 NwaCegarLoop]: 464 mSDtfsCounter, 138 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:31:59,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1369 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:31:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2024-11-02 12:31:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2416. [2024-11-02 12:31:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:31:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2024-11-02 12:31:59,939 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2024-11-02 12:31:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:31:59,940 INFO L471 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2024-11-02 12:31:59,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2024-11-02 12:31:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2024-11-02 12:31:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-02 12:31:59,946 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:31:59,946 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:31:59,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-02 12:32:00,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b069df81-f9b8-47ee-919c-1191ffce3709/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:00,147 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:00,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2052779614, now seen corresponding path program 1 times [2024-11-02 12:32:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:00,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069903880] [2024-11-02 12:32:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-02 12:32:00,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069903880] [2024-11-02 12:32:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069903880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:00,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998529344] [2024-11-02 12:32:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:00,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:00,336 INFO L87 Difference]: Start difference. First operand 2416 states and 3968 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, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-02 12:32:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:00,839 INFO L93 Difference]: Finished difference Result 5056 states and 8346 transitions. [2024-11-02 12:32:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:00,839 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, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 139 [2024-11-02 12:32:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:00,863 INFO L225 Difference]: With dead ends: 5056 [2024-11-02 12:32:00,863 INFO L226 Difference]: Without dead ends: 2620 [2024-11-02 12:32:00,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:00,875 INFO L432 NwaCegarLoop]: 480 mSDtfsCounter, 64 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:00,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1390 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:32:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2024-11-02 12:32:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2552. [2024-11-02 12:32:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1925 states have (on average 1.5698701298701299) internal successors, (3022), 1997 states have internal predecessors, (3022), 479 states have call successors, (479), 141 states have call predecessors, (479), 147 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2024-11-02 12:32:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4040 transitions. [2024-11-02 12:32:01,052 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4040 transitions. Word has length 139 [2024-11-02 12:32:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:01,053 INFO L471 AbstractCegarLoop]: Abstraction has 2552 states and 4040 transitions. [2024-11-02 12:32:01,053 INFO L472 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, (20), 1 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-02 12:32:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4040 transitions. [2024-11-02 12:32:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-02 12:32:01,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:01,061 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:01,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 12:32:01,061 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:01,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1214404019, now seen corresponding path program 1 times [2024-11-02 12:32:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:01,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288069982] [2024-11-02 12:32:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-02 12:32:01,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288069982] [2024-11-02 12:32:01,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288069982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:01,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:01,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:32:01,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890544857] [2024-11-02 12:32:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:01,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:32:01,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:32:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:32:01,419 INFO L87 Difference]: Start difference. First operand 2552 states and 4040 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19)