./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5 --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 d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:36:44,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:36:44,247 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:36:44,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:36:44,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:36:44,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:36:44,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:36:44,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:36:44,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:36:44,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:36:44,285 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:36:44,286 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:36:44,287 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:36:44,287 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:36:44,288 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:36:44,288 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:36:44,289 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:36:44,289 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:36:44,290 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:36:44,290 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:36:44,291 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:36:44,291 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:36:44,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:36:44,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:36:44,293 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:36:44,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:36:44,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:36:44,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:36:44,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:36:44,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:36:44,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:36:44,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:36:44,296 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:36:44,297 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:36:44,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:36:44,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:36:44,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:36:44,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:44,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:36:44,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:36:44,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:36:44,300 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:36:44,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:36:44,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:36:44,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:36:44,302 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:36:44,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:36:44,303 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_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2023-11-21 19:36:44,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:36:44,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:36:44,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:36:44,548 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:36:44,549 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:36:44,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2023-11-21 19:36:47,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:36:48,086 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:36:48,088 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2023-11-21 19:36:48,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/data/e25930632/e9866b54e8a942d796193a31759e542f/FLAGf6afdb839 [2023-11-21 19:36:48,125 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/data/e25930632/e9866b54e8a942d796193a31759e542f [2023-11-21 19:36:48,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:36:48,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:36:48,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:48,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:36:48,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:36:48,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:48" (1/1) ... [2023-11-21 19:36:48,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37995d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:48, skipping insertion in model container [2023-11-21 19:36:48,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:48" (1/1) ... [2023-11-21 19:36:48,223 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:36:48,464 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2023-11-21 19:36:48,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:48,890 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:36:48,900 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-21 19:36:48,902 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [151] [2023-11-21 19:36:48,902 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [160] [2023-11-21 19:36:48,903 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [198] [2023-11-21 19:36:48,903 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [564] [2023-11-21 19:36:48,903 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [753] [2023-11-21 19:36:48,903 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [873] [2023-11-21 19:36:48,904 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1540] [2023-11-21 19:36:48,904 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1558] [2023-11-21 19:36:48,904 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1907] [2023-11-21 19:36:48,911 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2023-11-21 19:36:49,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:49,052 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:36:49,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49 WrapperNode [2023-11-21 19:36:49,053 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:49,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:49,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:36:49,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:36:49,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,193 INFO L138 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1009 [2023-11-21 19:36:49,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:49,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:36:49,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:36:49,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:36:49,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,302 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,311 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:36:49,346 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:36:49,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:36:49,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:36:49,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (1/1) ... [2023-11-21 19:36:49,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:49,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:36:49,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:36:49,426 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-21 19:36:49,426 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-21 19:36:49,426 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-21 19:36:49,426 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-21 19:36:49,426 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-21 19:36:49,427 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-21 19:36:49,427 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-21 19:36:49,428 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-21 19:36:49,428 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-21 19:36:49,428 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-21 19:36:49,428 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-21 19:36:49,428 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-21 19:36:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-21 19:36:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-21 19:36:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-21 19:36:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-21 19:36:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-21 19:36:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-21 19:36:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-21 19:36:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-21 19:36:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-21 19:36:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-21 19:36:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:36:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-21 19:36:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-21 19:36:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-21 19:36:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-21 19:36:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-21 19:36:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-21 19:36:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-21 19:36:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-21 19:36:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-21 19:36:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-21 19:36:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-21 19:36:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-21 19:36:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-21 19:36:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-21 19:36:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-21 19:36:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-21 19:36:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-21 19:36:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-21 19:36:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-21 19:36:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-21 19:36:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-21 19:36:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-21 19:36:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-21 19:36:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-21 19:36:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-21 19:36:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-21 19:36:49,438 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-21 19:36:49,438 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-21 19:36:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-21 19:36:49,439 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-21 19:36:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:36:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-21 19:36:49,439 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-21 19:36:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:36:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:36:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-21 19:36:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-21 19:36:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-21 19:36:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-21 19:36:49,647 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:36:49,650 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:36:51,038 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:36:52,112 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:36:52,112 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:36:52,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:52 BoogieIcfgContainer [2023-11-21 19:36:52,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:36:52,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:36:52,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:36:52,122 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:36:52,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:36:48" (1/3) ... [2023-11-21 19:36:52,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d308fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:52, skipping insertion in model container [2023-11-21 19:36:52,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:49" (2/3) ... [2023-11-21 19:36:52,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d308fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:52, skipping insertion in model container [2023-11-21 19:36:52,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:52" (3/3) ... [2023-11-21 19:36:52,129 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2023-11-21 19:36:52,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:36:52,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:36:52,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:36:52,249 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a6c0550, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:36:52,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:36:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-21 19:36:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 19:36:52,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:52,276 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:52,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:52,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 188782675, now seen corresponding path program 1 times [2023-11-21 19:36:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399102258] [2023-11-21 19:36:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:36:53,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399102258] [2023-11-21 19:36:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399102258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:36:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291258451] [2023-11-21 19:36:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:53,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:36:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:53,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:36:53,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:36:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:53,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:36:53,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:36:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:53,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:36:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291258451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:53,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:36:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 19:36:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621604511] [2023-11-21 19:36:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:36:53,966 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 19:36:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:54,444 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2023-11-21 19:36:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:54,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-11-21 19:36:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:54,476 INFO L225 Difference]: With dead ends: 1225 [2023-11-21 19:36:54,477 INFO L226 Difference]: Without dead ends: 793 [2023-11-21 19:36:54,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:36:54,494 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 576 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:54,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1297 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:36:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-21 19:36:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2023-11-21 19:36:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2023-11-21 19:36:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2023-11-21 19:36:54,646 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2023-11-21 19:36:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:54,647 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2023-11-21 19:36:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 19:36:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2023-11-21 19:36:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-21 19:36:54,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:54,651 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:54,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:36:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:36:54,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:54,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2060075898, now seen corresponding path program 1 times [2023-11-21 19:36:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:54,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809556481] [2023-11-21 19:36:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:36:55,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:55,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809556481] [2023-11-21 19:36:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809556481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:36:55,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717518726] [2023-11-21 19:36:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:55,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:36:55,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:55,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:36:55,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:36:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:55,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:36:55,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:36:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:55,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:36:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717518726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:55,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:36:55,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 19:36:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241184320] [2023-11-21 19:36:55,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:55,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:55,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:55,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:55,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:36:55,802 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 19:36:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:56,104 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2023-11-21 19:36:56,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2023-11-21 19:36:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:56,118 INFO L225 Difference]: With dead ends: 1915 [2023-11-21 19:36:56,118 INFO L226 Difference]: Without dead ends: 1146 [2023-11-21 19:36:56,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:36:56,125 INFO L413 NwaCegarLoop]: 1060 mSDtfsCounter, 631 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1596 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:36:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-11-21 19:36:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2023-11-21 19:36:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2023-11-21 19:36:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2023-11-21 19:36:56,225 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2023-11-21 19:36:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:56,226 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2023-11-21 19:36:56,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 19:36:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2023-11-21 19:36:56,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 19:36:56,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:56,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:56,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:36:56,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:36:56,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:56,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1889733351, now seen corresponding path program 1 times [2023-11-21 19:36:56,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:56,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559796916] [2023-11-21 19:36:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:56,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:36:56,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559796916] [2023-11-21 19:36:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559796916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881896713] [2023-11-21 19:36:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:56,736 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:36:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:57,179 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2023-11-21 19:36:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2023-11-21 19:36:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:57,205 INFO L225 Difference]: With dead ends: 3336 [2023-11-21 19:36:57,205 INFO L226 Difference]: Without dead ends: 2226 [2023-11-21 19:36:57,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:57,217 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 633 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1284 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:36:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-11-21 19:36:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2023-11-21 19:36:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2023-11-21 19:36:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2023-11-21 19:36:57,395 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2023-11-21 19:36:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:57,397 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2023-11-21 19:36:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 19:36:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2023-11-21 19:36:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-21 19:36:57,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:57,415 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:36:57,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1651731105, now seen corresponding path program 1 times [2023-11-21 19:36:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:57,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144596867] [2023-11-21 19:36:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:57,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:36:58,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144596867] [2023-11-21 19:36:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144596867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:58,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:36:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493910686] [2023-11-21 19:36:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:58,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:36:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:36:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:36:58,009 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-21 19:36:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:59,018 INFO L93 Difference]: Finished difference Result 5283 states and 8573 transitions. [2023-11-21 19:36:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:36:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2023-11-21 19:36:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:59,050 INFO L225 Difference]: With dead ends: 5283 [2023-11-21 19:36:59,050 INFO L226 Difference]: Without dead ends: 3187 [2023-11-21 19:36:59,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:36:59,067 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 659 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:59,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 3233 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 19:36:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2023-11-21 19:36:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3090. [2023-11-21 19:36:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 2148 states have (on average 1.564711359404097) internal successors, (3361), 2277 states have internal predecessors, (3361), 747 states have call successors, (747), 192 states have call predecessors, (747), 194 states have return successors, (861), 689 states have call predecessors, (861), 742 states have call successors, (861) [2023-11-21 19:36:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4969 transitions. [2023-11-21 19:36:59,311 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4969 transitions. Word has length 94 [2023-11-21 19:36:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:59,312 INFO L495 AbstractCegarLoop]: Abstraction has 3090 states and 4969 transitions. [2023-11-21 19:36:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-21 19:36:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4969 transitions. [2023-11-21 19:36:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 19:36:59,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:59,321 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:59,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:36:59,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:59,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash 821200432, now seen corresponding path program 1 times [2023-11-21 19:36:59,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:59,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185062127] [2023-11-21 19:36:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:59,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 19:36:59,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185062127] [2023-11-21 19:36:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185062127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:36:59,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496527681] [2023-11-21 19:36:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:59,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:36:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:59,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:36:59,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:37:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:00,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:37:00,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:37:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 19:37:00,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:37:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496527681] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:37:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:37:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-21 19:37:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264845408] [2023-11-21 19:37:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:37:00,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:37:00,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:37:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:37:00,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-21 19:37:00,244 INFO L87 Difference]: Start difference. First operand 3090 states and 4969 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-21 19:37:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:37:01,458 INFO L93 Difference]: Finished difference Result 8380 states and 13794 transitions. [2023-11-21 19:37:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:37:01,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2023-11-21 19:37:01,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:37:01,513 INFO L225 Difference]: With dead ends: 8380 [2023-11-21 19:37:01,514 INFO L226 Difference]: Without dead ends: 5302 [2023-11-21 19:37:01,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:37:01,549 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 561 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:37:01,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 2737 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:37:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2023-11-21 19:37:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 5259. [2023-11-21 19:37:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5259 states, 3644 states have (on average 1.5030186608122942) internal successors, (5477), 3862 states have internal predecessors, (5477), 1267 states have call successors, (1267), 351 states have call predecessors, (1267), 347 states have return successors, (1581), 1154 states have call predecessors, (1581), 1259 states have call successors, (1581) [2023-11-21 19:37:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 8325 transitions. [2023-11-21 19:37:02,050 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 8325 transitions. Word has length 95 [2023-11-21 19:37:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:37:02,051 INFO L495 AbstractCegarLoop]: Abstraction has 5259 states and 8325 transitions. [2023-11-21 19:37:02,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-21 19:37:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 8325 transitions. [2023-11-21 19:37:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-21 19:37:02,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:37:02,062 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:37:02,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:37:02,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:37:02,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:37:02,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:37:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1371000865, now seen corresponding path program 1 times [2023-11-21 19:37:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:37:02,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020110189] [2023-11-21 19:37:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:37:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 19:37:02,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:37:02,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020110189] [2023-11-21 19:37:02,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020110189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:37:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048945089] [2023-11-21 19:37:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:37:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:37:02,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:37:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:37:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:03,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:37:03,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:37:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:37:03,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:37:03,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048945089] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:37:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:37:03,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-21 19:37:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001345947] [2023-11-21 19:37:03,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:37:03,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:37:03,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:37:03,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:37:03,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:37:03,186 INFO L87 Difference]: Start difference. First operand 5259 states and 8325 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 19:37:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:37:03,705 INFO L93 Difference]: Finished difference Result 11698 states and 18620 transitions. [2023-11-21 19:37:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:37:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2023-11-21 19:37:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:37:03,777 INFO L225 Difference]: With dead ends: 11698 [2023-11-21 19:37:03,777 INFO L226 Difference]: Without dead ends: 6451 [2023-11-21 19:37:03,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:37:03,821 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 592 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:37:03,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1282 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:37:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2023-11-21 19:37:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5173. [2023-11-21 19:37:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 3584 states have (on average 1.5027901785714286) internal successors, (5386), 3803 states have internal predecessors, (5386), 1250 states have call successors, (1250), 345 states have call predecessors, (1250), 338 states have return successors, (1520), 1133 states have call predecessors, (1520), 1242 states have call successors, (1520) [2023-11-21 19:37:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 8156 transitions. [2023-11-21 19:37:04,322 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 8156 transitions. Word has length 93 [2023-11-21 19:37:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:37:04,323 INFO L495 AbstractCegarLoop]: Abstraction has 5173 states and 8156 transitions. [2023-11-21 19:37:04,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-21 19:37:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 8156 transitions. [2023-11-21 19:37:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-21 19:37:04,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:37:04,331 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:37:04,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:37:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 19:37:04,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:37:04,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:37:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1561708344, now seen corresponding path program 1 times [2023-11-21 19:37:04,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:37:04,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419617798] [2023-11-21 19:37:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:37:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:37:05,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:37:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419617798] [2023-11-21 19:37:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419617798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:37:05,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324482282] [2023-11-21 19:37:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:05,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:37:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:37:05,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:37:05,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:37:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:05,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 19:37:05,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:37:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-21 19:37:05,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:37:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324482282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:37:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:37:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2023-11-21 19:37:05,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822310338] [2023-11-21 19:37:05,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:37:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:37:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:37:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:37:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:37:05,883 INFO L87 Difference]: Start difference. First operand 5173 states and 8156 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:37:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:37:06,575 INFO L93 Difference]: Finished difference Result 11364 states and 17884 transitions. [2023-11-21 19:37:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:37:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-11-21 19:37:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:37:06,653 INFO L225 Difference]: With dead ends: 11364 [2023-11-21 19:37:06,654 INFO L226 Difference]: Without dead ends: 6203 [2023-11-21 19:37:06,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:37:06,693 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 440 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:37:06,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 1813 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:37:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6203 states. [2023-11-21 19:37:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6203 to 6159. [2023-11-21 19:37:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6159 states, 4237 states have (on average 1.4666037290535756) internal successors, (6214), 4460 states have internal predecessors, (6214), 1457 states have call successors, (1457), 450 states have call predecessors, (1457), 464 states have return successors, (1860), 1354 states have call predecessors, (1860), 1446 states have call successors, (1860) [2023-11-21 19:37:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6159 states to 6159 states and 9531 transitions. [2023-11-21 19:37:07,258 INFO L78 Accepts]: Start accepts. Automaton has 6159 states and 9531 transitions. Word has length 99 [2023-11-21 19:37:07,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:37:07,259 INFO L495 AbstractCegarLoop]: Abstraction has 6159 states and 9531 transitions. [2023-11-21 19:37:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:37:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6159 states and 9531 transitions. [2023-11-21 19:37:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-21 19:37:07,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:37:07,265 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:37:07,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:37:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 19:37:07,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:37:07,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:37:07,481 INFO L85 PathProgramCache]: Analyzing trace with hash 413183336, now seen corresponding path program 1 times [2023-11-21 19:37:07,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:37:07,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569537038] [2023-11-21 19:37:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:07,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:37:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:37:08,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:37:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569537038] [2023-11-21 19:37:08,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569537038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:37:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797631190] [2023-11-21 19:37:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:37:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:37:08,357 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:37:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c60f5366-a35d-4685-ab49-0a58b8e6370b/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:37:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:08,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 19:37:08,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:37:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 19:37:09,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:37:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:37:09,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797631190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:37:09,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639846427] [2023-11-21 19:37:09,535 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-11-21 19:37:09,535 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:37:09,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:37:09,544 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:37:09,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:37:29,371 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs