./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh --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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:34:08,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:34:08,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:34:08,794 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:34:08,795 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:34:08,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:34:08,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:34:08,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:34:08,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:34:08,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:34:08,822 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:34:08,822 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:34:08,823 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:34:08,823 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:34:08,824 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:34:08,824 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:34:08,825 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:34:08,825 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:34:08,826 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:34:08,826 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:34:08,827 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:34:08,830 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:34:08,831 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:34:08,831 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:34:08,832 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:34:08,832 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:34:08,833 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:34:08,833 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:34:08,833 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:34:08,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:34:08,834 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:34:08,834 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:34:08,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:34:08,835 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:34:08,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:34:08,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:34:08,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:34:08,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:08,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:34:08,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:34:08,836 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:34:08,837 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:34:08,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:34:08,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:34:08,837 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:34:08,838 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:34:08,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:34:08,838 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_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2023-12-02 15:34:09,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:34:09,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:34:09,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:34:09,109 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:34:09,110 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:34:09,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2023-12-02 15:34:11,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:34:12,234 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:34:12,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2023-12-02 15:34:12,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/data/eeb86c8cd/936e9e38e98b4706acd9d9fd77664ce9/FLAG1f5f850fa [2023-12-02 15:34:12,279 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/data/eeb86c8cd/936e9e38e98b4706acd9d9fd77664ce9 [2023-12-02 15:34:12,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:34:12,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:34:12,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:12,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:34:12,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:34:12,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:12" (1/1) ... [2023-12-02 15:34:12,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40dc85de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:12, skipping insertion in model container [2023-12-02 15:34:12,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:34:12" (1/1) ... [2023-12-02 15:34:12,392 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:34:12,564 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_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2023-12-02 15:34:12,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:12,904 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:34:12,914 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-12-02 15:34:12,915 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [57] [2023-12-02 15:34:12,916 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [160] [2023-12-02 15:34:12,916 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [251] [2023-12-02 15:34:12,916 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [604] [2023-12-02 15:34:12,916 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1271] [2023-12-02 15:34:12,917 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1391] [2023-12-02 15:34:12,917 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1426] [2023-12-02 15:34:12,917 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1792] [2023-12-02 15:34:12,918 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3453] [2023-12-02 15:34:12,921 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_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2023-12-02 15:34:13,030 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:34:13,086 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:34:13,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13 WrapperNode [2023-12-02 15:34:13,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:34:13,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:13,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:34:13,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:34:13,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,184 INFO L138 Inliner]: procedures = 97, calls = 354, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 937 [2023-12-02 15:34:13,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:34:13,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:34:13,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:34:13,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:34:13,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,239 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,259 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,267 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,275 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:34:13,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:34:13,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:34:13,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:34:13,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (1/1) ... [2023-12-02 15:34:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:34:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:13,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:34:13,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:34:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-12-02 15:34:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-12-02 15:34:13,383 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-12-02 15:34:13,383 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-12-02 15:34:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 15:34:13,384 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 15:34:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 15:34:13,384 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 15:34:13,384 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 15:34:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 15:34:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 15:34:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 15:34:13,385 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 15:34:13,385 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 15:34:13,386 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 15:34:13,386 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 15:34:13,386 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 15:34:13,386 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 15:34:13,386 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 15:34:13,386 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 15:34:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 15:34:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 15:34:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 15:34:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 15:34:13,387 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 15:34:13,387 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 15:34:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:34:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 15:34:13,388 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 15:34:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 15:34:13,388 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 15:34:13,388 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 15:34:13,389 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 15:34:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-12-02 15:34:13,389 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-12-02 15:34:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 15:34:13,389 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 15:34:13,390 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 15:34:13,390 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 15:34:13,390 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 15:34:13,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 15:34:13,390 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 15:34:13,390 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 15:34:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 15:34:13,391 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 15:34:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 15:34:13,391 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 15:34:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 15:34:13,391 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 15:34:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 15:34:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 15:34:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 15:34:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 15:34:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:34:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 15:34:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 15:34:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:34:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:34:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 15:34:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 15:34:13,393 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-12-02 15:34:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-12-02 15:34:13,572 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:34:13,575 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:34:14,702 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:34:15,459 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:34:15,459 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 15:34:15,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:15 BoogieIcfgContainer [2023-12-02 15:34:15,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:34:15,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:34:15,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:34:15,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:34:15,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:34:12" (1/3) ... [2023-12-02 15:34:15,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4689c3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:15, skipping insertion in model container [2023-12-02 15:34:15,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:34:13" (2/3) ... [2023-12-02 15:34:15,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4689c3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:34:15, skipping insertion in model container [2023-12-02 15:34:15,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:34:15" (3/3) ... [2023-12-02 15:34:15,471 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2023-12-02 15:34:15,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:34:15,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:34:15,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:34:15,571 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;@6ea530dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:34:15,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:34:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2023-12-02 15:34:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 15:34:15,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:15,601 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:15,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:15,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash 433494948, now seen corresponding path program 1 times [2023-12-02 15:34:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:15,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313395739] [2023-12-02 15:34:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:15,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:16,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313395739] [2023-12-02 15:34:16,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313395739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:16,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:34:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594686215] [2023-12-02 15:34:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:16,465 INFO L87 Difference]: Start difference. First operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 15:34:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:19,725 INFO L93 Difference]: Finished difference Result 1834 states and 2976 transitions. [2023-12-02 15:34:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-12-02 15:34:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:19,756 INFO L225 Difference]: With dead ends: 1834 [2023-12-02 15:34:19,756 INFO L226 Difference]: Without dead ends: 1392 [2023-12-02 15:34:19,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:34:19,770 INFO L413 NwaCegarLoop]: 911 mSDtfsCounter, 2046 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:19,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2127 Valid, 1501 Invalid, 2639 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [472 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 15:34:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2023-12-02 15:34:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1279. [2023-12-02 15:34:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 916 states have (on average 1.5753275109170306) internal successors, (1443), 951 states have internal predecessors, (1443), 292 states have call successors, (292), 71 states have call predecessors, (292), 70 states have return successors, (310), 271 states have call predecessors, (310), 288 states have call successors, (310) [2023-12-02 15:34:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2045 transitions. [2023-12-02 15:34:19,992 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2045 transitions. Word has length 70 [2023-12-02 15:34:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:19,993 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 2045 transitions. [2023-12-02 15:34:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 15:34:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2045 transitions. [2023-12-02 15:34:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 15:34:20,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:20,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:34:20,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:20,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:20,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1711307614, now seen corresponding path program 1 times [2023-12-02 15:34:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:20,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120281355] [2023-12-02 15:34:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:20,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 15:34:20,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:20,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120281355] [2023-12-02 15:34:20,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120281355] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:20,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:34:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734618443] [2023-12-02 15:34:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:20,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:34:20,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:34:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:20,467 INFO L87 Difference]: Start difference. First operand 1279 states and 2045 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 15:34:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:23,490 INFO L93 Difference]: Finished difference Result 4200 states and 6788 transitions. [2023-12-02 15:34:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:34:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 102 [2023-12-02 15:34:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:23,525 INFO L225 Difference]: With dead ends: 4200 [2023-12-02 15:34:23,525 INFO L226 Difference]: Without dead ends: 2937 [2023-12-02 15:34:23,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:34:23,539 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1336 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:23,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 1564 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 15:34:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2023-12-02 15:34:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2642. [2023-12-02 15:34:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1898 states have (on average 1.5742887249736566) internal successors, (2988), 1966 states have internal predecessors, (2988), 593 states have call successors, (593), 143 states have call predecessors, (593), 150 states have return successors, (672), 558 states have call predecessors, (672), 587 states have call successors, (672) [2023-12-02 15:34:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4253 transitions. [2023-12-02 15:34:23,847 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4253 transitions. Word has length 102 [2023-12-02 15:34:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4253 transitions. [2023-12-02 15:34:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 15:34:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4253 transitions. [2023-12-02 15:34:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 15:34:23,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:23,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:23,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:34:23,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:23,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 375030581, now seen corresponding path program 1 times [2023-12-02 15:34:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663110261] [2023-12-02 15:34:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 15:34:24,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:24,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663110261] [2023-12-02 15:34:24,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663110261] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:24,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665301183] [2023-12-02 15:34:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:24,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:24,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:24,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:24,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:34:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:24,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:24,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:24,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665301183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:24,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:24,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-02 15:34:24,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870242919] [2023-12-02 15:34:24,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:24,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:24,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:24,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:24,500 INFO L87 Difference]: Start difference. First operand 2642 states and 4253 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:24,896 INFO L93 Difference]: Finished difference Result 5305 states and 8644 transitions. [2023-12-02 15:34:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 106 [2023-12-02 15:34:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:24,926 INFO L225 Difference]: With dead ends: 5305 [2023-12-02 15:34:24,926 INFO L226 Difference]: Without dead ends: 2678 [2023-12-02 15:34:24,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:24,951 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 85 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:24,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1821 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:24,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2023-12-02 15:34:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2678. [2023-12-02 15:34:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 1928 states have (on average 1.5684647302904564) internal successors, (3024), 1996 states have internal predecessors, (3024), 593 states have call successors, (593), 149 states have call predecessors, (593), 156 states have return successors, (672), 558 states have call predecessors, (672), 587 states have call successors, (672) [2023-12-02 15:34:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 4289 transitions. [2023-12-02 15:34:25,217 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 4289 transitions. Word has length 106 [2023-12-02 15:34:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:25,218 INFO L495 AbstractCegarLoop]: Abstraction has 2678 states and 4289 transitions. [2023-12-02 15:34:25,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 4289 transitions. [2023-12-02 15:34:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 15:34:25,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:25,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:25,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:25,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:25,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1579806164, now seen corresponding path program 1 times [2023-12-02 15:34:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:25,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922903738] [2023-12-02 15:34:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 15:34:25,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922903738] [2023-12-02 15:34:25,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922903738] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:25,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:34:25,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:34:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102977387] [2023-12-02 15:34:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:25,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:25,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:25,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:25,697 INFO L87 Difference]: Start difference. First operand 2678 states and 4289 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:26,177 INFO L93 Difference]: Finished difference Result 6093 states and 9748 transitions. [2023-12-02 15:34:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2023-12-02 15:34:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:26,203 INFO L225 Difference]: With dead ends: 6093 [2023-12-02 15:34:26,203 INFO L226 Difference]: Without dead ends: 3430 [2023-12-02 15:34:26,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:34:26,223 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 520 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:26,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 2011 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:34:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2023-12-02 15:34:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3338. [2023-12-02 15:34:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2401 states have (on average 1.544356518117451) internal successors, (3708), 2467 states have internal predecessors, (3708), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2023-12-02 15:34:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5272 transitions. [2023-12-02 15:34:26,433 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5272 transitions. Word has length 107 [2023-12-02 15:34:26,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:26,433 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 5272 transitions. [2023-12-02 15:34:26,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5272 transitions. [2023-12-02 15:34:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 15:34:26,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:26,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:26,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:34:26,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:26,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash -297378132, now seen corresponding path program 1 times [2023-12-02 15:34:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:26,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644066048] [2023-12-02 15:34:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:26,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:34:26,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644066048] [2023-12-02 15:34:26,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644066048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332489736] [2023-12-02 15:34:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:26,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:26,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:26,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:34:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:26,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:26,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 15:34:27,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:27,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332489736] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:27,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:27,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 15:34:27,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826801593] [2023-12-02 15:34:27,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:27,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:27,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:27,026 INFO L87 Difference]: Start difference. First operand 3338 states and 5272 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:27,402 INFO L93 Difference]: Finished difference Result 6688 states and 10690 transitions. [2023-12-02 15:34:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2023-12-02 15:34:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:27,430 INFO L225 Difference]: With dead ends: 6688 [2023-12-02 15:34:27,430 INFO L226 Difference]: Without dead ends: 3329 [2023-12-02 15:34:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:27,454 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 91 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:27,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1817 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2023-12-02 15:34:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3329. [2023-12-02 15:34:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 2392 states have (on average 1.5351170568561874) internal successors, (3672), 2458 states have internal predecessors, (3672), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2023-12-02 15:34:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 5236 transitions. [2023-12-02 15:34:27,699 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 5236 transitions. Word has length 108 [2023-12-02 15:34:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:27,700 INFO L495 AbstractCegarLoop]: Abstraction has 3329 states and 5236 transitions. [2023-12-02 15:34:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 5236 transitions. [2023-12-02 15:34:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 15:34:27,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:27,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:27,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:34:27,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:27,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:27,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1188619730, now seen corresponding path program 1 times [2023-12-02 15:34:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:27,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225405634] [2023-12-02 15:34:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:27,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:34:28,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225405634] [2023-12-02 15:34:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225405634] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464956567] [2023-12-02 15:34:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:28,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:28,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:28,126 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:28,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:34:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:28,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:28,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:28,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:28,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464956567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:28,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:28,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 15:34:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793192114] [2023-12-02 15:34:28,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:28,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:28,574 INFO L87 Difference]: Start difference. First operand 3329 states and 5236 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:29,956 INFO L93 Difference]: Finished difference Result 8508 states and 13836 transitions. [2023-12-02 15:34:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2023-12-02 15:34:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:30,010 INFO L225 Difference]: With dead ends: 8508 [2023-12-02 15:34:30,010 INFO L226 Difference]: Without dead ends: 5194 [2023-12-02 15:34:30,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:30,036 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 649 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 2163 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:30,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 2163 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:34:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2023-12-02 15:34:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 5124. [2023-12-02 15:34:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 3687 states have (on average 1.4890154597233523) internal successors, (5490), 3781 states have internal predecessors, (5490), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 333 states have return successors, (1471), 1062 states have call predecessors, (1471), 1091 states have call successors, (1471) [2023-12-02 15:34:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8064 transitions. [2023-12-02 15:34:30,502 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 8064 transitions. Word has length 109 [2023-12-02 15:34:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:30,503 INFO L495 AbstractCegarLoop]: Abstraction has 5124 states and 8064 transitions. [2023-12-02 15:34:30,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 8064 transitions. [2023-12-02 15:34:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 15:34:30,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:30,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:30,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:30,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:30,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:30,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 313150287, now seen corresponding path program 1 times [2023-12-02 15:34:30,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:30,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55189810] [2023-12-02 15:34:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:30,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:30,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55189810] [2023-12-02 15:34:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55189810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102597170] [2023-12-02 15:34:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:30,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:30,938 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:30,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:34:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:31,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:31,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:34:31,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102597170] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:31,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 15:34:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169769290] [2023-12-02 15:34:31,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:31,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:31,389 INFO L87 Difference]: Start difference. First operand 5124 states and 8064 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:31,947 INFO L93 Difference]: Finished difference Result 10409 states and 16704 transitions. [2023-12-02 15:34:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:34:31,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2023-12-02 15:34:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:31,997 INFO L225 Difference]: With dead ends: 10409 [2023-12-02 15:34:31,997 INFO L226 Difference]: Without dead ends: 5300 [2023-12-02 15:34:32,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:32,022 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 1 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:32,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2565 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2023-12-02 15:34:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 5234. [2023-12-02 15:34:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 3782 states have (on average 1.4767318878900053) internal successors, (5585), 3851 states have internal predecessors, (5585), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 348 states have return successors, (1542), 1102 states have call predecessors, (1542), 1091 states have call successors, (1542) [2023-12-02 15:34:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8230 transitions. [2023-12-02 15:34:32,477 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8230 transitions. Word has length 110 [2023-12-02 15:34:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:32,478 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 8230 transitions. [2023-12-02 15:34:32,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 15:34:32,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8230 transitions. [2023-12-02 15:34:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 15:34:32,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:32,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:32,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:34:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:32,685 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:32,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash -389352005, now seen corresponding path program 1 times [2023-12-02 15:34:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338864760] [2023-12-02 15:34:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:34:32,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:32,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338864760] [2023-12-02 15:34:32,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338864760] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023266589] [2023-12-02 15:34:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:32,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:32,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:32,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:34:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:33,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:34:33,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:34:33,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023266589] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:33,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-12-02 15:34:33,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735288669] [2023-12-02 15:34:33,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:34:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:34:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:34:33,447 INFO L87 Difference]: Start difference. First operand 5234 states and 8230 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:34,672 INFO L93 Difference]: Finished difference Result 11731 states and 18766 transitions. [2023-12-02 15:34:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:34:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2023-12-02 15:34:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:34,713 INFO L225 Difference]: With dead ends: 11731 [2023-12-02 15:34:34,714 INFO L226 Difference]: Without dead ends: 6512 [2023-12-02 15:34:34,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:34:34,729 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 777 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:34,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 3322 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:34:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2023-12-02 15:34:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 6384. [2023-12-02 15:34:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 4663 states have (on average 1.4623632854385589) internal successors, (6819), 4754 states have internal predecessors, (6819), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2023-12-02 15:34:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 10245 transitions. [2023-12-02 15:34:35,165 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 10245 transitions. Word has length 110 [2023-12-02 15:34:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:35,166 INFO L495 AbstractCegarLoop]: Abstraction has 6384 states and 10245 transitions. [2023-12-02 15:34:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 10245 transitions. [2023-12-02 15:34:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 15:34:35,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:35,171 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:35,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:35,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:35,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:35,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1237297823, now seen corresponding path program 1 times [2023-12-02 15:34:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332102792] [2023-12-02 15:34:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:35,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332102792] [2023-12-02 15:34:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332102792] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932436785] [2023-12-02 15:34:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:35,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:35,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:34:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:36,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:36,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:34:36,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932436785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:36,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:36,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 15:34:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261444912] [2023-12-02 15:34:36,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:36,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:36,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:36,079 INFO L87 Difference]: Start difference. First operand 6384 states and 10245 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-12-02 15:34:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:36,688 INFO L93 Difference]: Finished difference Result 13081 states and 21609 transitions. [2023-12-02 15:34:36,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 112 [2023-12-02 15:34:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:36,725 INFO L225 Difference]: With dead ends: 13081 [2023-12-02 15:34:36,726 INFO L226 Difference]: Without dead ends: 6721 [2023-12-02 15:34:36,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:34:36,761 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 19 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:36,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1769 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:34:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2023-12-02 15:34:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6643. [2023-12-02 15:34:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 4922 states have (on average 1.4713531084924827) internal successors, (7242), 5013 states have internal predecessors, (7242), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2023-12-02 15:34:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 10668 transitions. [2023-12-02 15:34:37,205 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 10668 transitions. Word has length 112 [2023-12-02 15:34:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:37,206 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 10668 transitions. [2023-12-02 15:34:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-12-02 15:34:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 10668 transitions. [2023-12-02 15:34:37,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 15:34:37,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:37,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:37,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:37,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:37,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:37,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1249551051, now seen corresponding path program 1 times [2023-12-02 15:34:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518504348] [2023-12-02 15:34:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:37,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:37,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518504348] [2023-12-02 15:34:37,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518504348] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:37,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586298007] [2023-12-02 15:34:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:37,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:37,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:37,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:34:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:38,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:38,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:38,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586298007] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 15:34:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303292773] [2023-12-02 15:34:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:38,070 INFO L87 Difference]: Start difference. First operand 6643 states and 10668 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:39,827 INFO L93 Difference]: Finished difference Result 16700 states and 28678 transitions. [2023-12-02 15:34:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 114 [2023-12-02 15:34:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:39,899 INFO L225 Difference]: With dead ends: 16700 [2023-12-02 15:34:39,899 INFO L226 Difference]: Without dead ends: 11368 [2023-12-02 15:34:39,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:39,947 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 655 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:39,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 2241 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:34:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2023-12-02 15:34:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 11132. [2023-12-02 15:34:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 8262 states have (on average 1.4663519728879206) internal successors, (12115), 8409 states have internal predecessors, (12115), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2023-12-02 15:34:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 18666 transitions. [2023-12-02 15:34:41,098 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 18666 transitions. Word has length 114 [2023-12-02 15:34:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:41,099 INFO L495 AbstractCegarLoop]: Abstraction has 11132 states and 18666 transitions. [2023-12-02 15:34:41,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 18666 transitions. [2023-12-02 15:34:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 15:34:41,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:41,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:41,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:34:41,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:34:41,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:41,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 780111135, now seen corresponding path program 1 times [2023-12-02 15:34:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:41,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313699580] [2023-12-02 15:34:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:41,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313699580] [2023-12-02 15:34:41,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313699580] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516202659] [2023-12-02 15:34:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:41,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:41,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:41,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:34:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:41,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:34:41,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 15:34:41,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516202659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-02 15:34:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831114648] [2023-12-02 15:34:41,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:41,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:34:41,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:34:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:41,846 INFO L87 Difference]: Start difference. First operand 11132 states and 18666 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-12-02 15:34:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:42,628 INFO L93 Difference]: Finished difference Result 22544 states and 39469 transitions. [2023-12-02 15:34:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:34:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 114 [2023-12-02 15:34:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:42,684 INFO L225 Difference]: With dead ends: 22544 [2023-12-02 15:34:42,684 INFO L226 Difference]: Without dead ends: 11436 [2023-12-02 15:34:42,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:34:42,792 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 5 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:42,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1277 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:34:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11436 states. [2023-12-02 15:34:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11436 to 11178. [2023-12-02 15:34:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 8308 states have (on average 1.4534183919114108) internal successors, (12075), 8455 states have internal predecessors, (12075), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2023-12-02 15:34:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 18626 transitions. [2023-12-02 15:34:43,670 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 18626 transitions. Word has length 114 [2023-12-02 15:34:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:43,671 INFO L495 AbstractCegarLoop]: Abstraction has 11178 states and 18626 transitions. [2023-12-02 15:34:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-12-02 15:34:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 18626 transitions. [2023-12-02 15:34:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 15:34:43,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:43,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:43,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:43,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:43,878 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:43,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1032371592, now seen corresponding path program 1 times [2023-12-02 15:34:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788316394] [2023-12-02 15:34:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:44,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788316394] [2023-12-02 15:34:44,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788316394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:44,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422625826] [2023-12-02 15:34:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:44,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:44,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:44,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:44,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:34:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:44,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:44,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:44,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422625826] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 15:34:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940375483] [2023-12-02 15:34:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:44,474 INFO L87 Difference]: Start difference. First operand 11178 states and 18626 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:46,135 INFO L93 Difference]: Finished difference Result 25707 states and 45200 transitions. [2023-12-02 15:34:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 115 [2023-12-02 15:34:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:46,222 INFO L225 Difference]: With dead ends: 25707 [2023-12-02 15:34:46,222 INFO L226 Difference]: Without dead ends: 15867 [2023-12-02 15:34:46,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:46,299 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 690 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:46,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 2065 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:34:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2023-12-02 15:34:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 15657. [2023-12-02 15:34:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 11638 states have (on average 1.4512802887094003) internal successors, (16890), 11841 states have internal predecessors, (16890), 2898 states have call successors, (2898), 989 states have call predecessors, (2898), 1120 states have return successors, (7365), 2910 states have call predecessors, (7365), 2852 states have call successors, (7365) [2023-12-02 15:34:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 27153 transitions. [2023-12-02 15:34:47,702 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 27153 transitions. Word has length 115 [2023-12-02 15:34:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:47,703 INFO L495 AbstractCegarLoop]: Abstraction has 15657 states and 27153 transitions. [2023-12-02 15:34:47,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 27153 transitions. [2023-12-02 15:34:47,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 15:34:47,708 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:47,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:47,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:34:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:34:47,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:47,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1795469365, now seen corresponding path program 1 times [2023-12-02 15:34:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:47,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33499755] [2023-12-02 15:34:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:47,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:48,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:48,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33499755] [2023-12-02 15:34:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33499755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:48,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035368141] [2023-12-02 15:34:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:48,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:48,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:34:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:48,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:34:48,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:48,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:34:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035368141] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:48,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:48,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 15:34:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412750693] [2023-12-02 15:34:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:34:48,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:48,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:34:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:34:48,569 INFO L87 Difference]: Start difference. First operand 15657 states and 27153 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:34:50,274 INFO L93 Difference]: Finished difference Result 33780 states and 60840 transitions. [2023-12-02 15:34:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:34:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 116 [2023-12-02 15:34:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:34:50,389 INFO L225 Difference]: With dead ends: 33780 [2023-12-02 15:34:50,389 INFO L226 Difference]: Without dead ends: 19482 [2023-12-02 15:34:50,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:34:50,502 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 710 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:34:50,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1998 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:34:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19482 states. [2023-12-02 15:34:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19482 to 18874. [2023-12-02 15:34:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18874 states, 13907 states have (on average 1.4505644639390236) internal successors, (20173), 14180 states have internal predecessors, (20173), 3602 states have call successors, (3602), 1228 states have call predecessors, (3602), 1364 states have return successors, (9721), 3573 states have call predecessors, (9721), 3547 states have call successors, (9721) [2023-12-02 15:34:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18874 states to 18874 states and 33496 transitions. [2023-12-02 15:34:51,597 INFO L78 Accepts]: Start accepts. Automaton has 18874 states and 33496 transitions. Word has length 116 [2023-12-02 15:34:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:34:51,597 INFO L495 AbstractCegarLoop]: Abstraction has 18874 states and 33496 transitions. [2023-12-02 15:34:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 15:34:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 18874 states and 33496 transitions. [2023-12-02 15:34:51,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 15:34:51,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:34:51,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:34:51,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 15:34:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:51,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:34:51,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:34:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -608722964, now seen corresponding path program 1 times [2023-12-02 15:34:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:34:51,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442400641] [2023-12-02 15:34:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:51,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:34:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 15:34:52,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:34:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442400641] [2023-12-02 15:34:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442400641] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:34:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182387800] [2023-12-02 15:34:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:34:52,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:34:52,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:34:52,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:34:52,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:34:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:34:52,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:34:52,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:34:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:34:52,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:34:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:34:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182387800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:34:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046313620] [2023-12-02 15:34:52,627 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2023-12-02 15:34:52,627 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:34:52,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:34:52,636 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:34:52,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:35:09,601 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2023-12-02 15:35:24,610 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 574 for LOIs [2023-12-02 15:35:57,565 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 457 for LOIs [2023-12-02 15:36:04,966 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 458 for LOIs [2023-12-02 15:36:12,889 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 460 for LOIs [2023-12-02 15:36:14,315 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 474 for LOIs [2023-12-02 15:36:15,598 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 27 for LOIs [2023-12-02 15:36:15,622 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 476 for LOIs [2023-12-02 15:36:28,227 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 472 for LOIs [2023-12-02 15:36:29,496 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 441 for LOIs [2023-12-02 15:36:29,849 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 544 for LOIs [2023-12-02 15:36:40,494 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 626 for LOIs [2023-12-02 15:36:45,150 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 518 for LOIs [2023-12-02 15:36:46,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:37:01,732 WARN L293 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 562 DAG size of output: 528 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:37:22,291 WARN L293 SmtUtils]: Spent 12.59s on a formula simplification. DAG size of input: 626 DAG size of output: 590 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:37:37,709 WARN L293 SmtUtils]: Spent 14.94s on a formula simplification. DAG size of input: 879 DAG size of output: 678 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:38:32,955 WARN L293 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 458 DAG size of output: 458 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:38:41,220 WARN L293 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 460 DAG size of output: 460 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:38:54,003 WARN L293 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 501 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:39:21,660 WARN L293 SmtUtils]: Spent 12.38s on a formula simplification. DAG size of input: 478 DAG size of output: 475 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:40:18,632 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 609 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:40:26,351 WARN L293 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 609 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:41:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2046313620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:41:09,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:41:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [5, 6, 7] total 75 [2023-12-02 15:41:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785895226] [2023-12-02 15:41:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:41:09,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 15:41:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 15:41:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=5085, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 15:41:09,558 INFO L87 Difference]: Start difference. First operand 18874 states and 33496 transitions. Second operand has 63 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 15:41:46,670 WARN L293 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 599 DAG size of output: 582 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:43:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:43:35,828 INFO L93 Difference]: Finished difference Result 38232 states and 67718 transitions. [2023-12-02 15:43:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 15:43:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 117 [2023-12-02 15:43:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:43:35,929 INFO L225 Difference]: With dead ends: 38232 [2023-12-02 15:43:35,929 INFO L226 Difference]: Without dead ends: 19381 [2023-12-02 15:43:36,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2310 ImplicationChecksByTransitivity, 309.2s TimeCoverageRelationStatistics Valid=550, Invalid=6590, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 15:43:36,064 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 428 mSDsluCounter, 10787 mSDsCounter, 0 mSdLazyCounter, 20656 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 11294 SdHoareTripleChecker+Invalid, 20742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 20656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:43:36,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 11294 Invalid, 20742 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [86 Valid, 20656 Invalid, 0 Unknown, 0 Unchecked, 97.9s Time] [2023-12-02 15:43:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19381 states. [2023-12-02 15:43:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19381 to 19300. [2023-12-02 15:43:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19300 states, 14248 states have (on average 1.4484138124649073) internal successors, (20637), 14523 states have internal predecessors, (20637), 3651 states have call successors, (3651), 1251 states have call predecessors, (3651), 1400 states have return successors, (9784), 3633 states have call predecessors, (9784), 3596 states have call successors, (9784) [2023-12-02 15:43:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19300 states to 19300 states and 34072 transitions. [2023-12-02 15:43:37,519 INFO L78 Accepts]: Start accepts. Automaton has 19300 states and 34072 transitions. Word has length 117 [2023-12-02 15:43:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:43:37,519 INFO L495 AbstractCegarLoop]: Abstraction has 19300 states and 34072 transitions. [2023-12-02 15:43:37,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 15:43:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 19300 states and 34072 transitions. [2023-12-02 15:43:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 15:43:37,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:43:37,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:43:37,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:43:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:37,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:43:37,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:43:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash 74712143, now seen corresponding path program 1 times [2023-12-02 15:43:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:43:37,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502271978] [2023-12-02 15:43:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:37,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:43:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:43:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:43:37,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:43:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502271978] [2023-12-02 15:43:37,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502271978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:43:37,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275184234] [2023-12-02 15:43:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:43:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:43:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:43:37,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:43:37,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d19f6b5-2c28-4310-9fa6-8ac2fd381cef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:43:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:43:38,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:43:38,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:43:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 15:43:38,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:43:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:43:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275184234] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:43:38,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30531360] [2023-12-02 15:43:38,605 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2023-12-02 15:43:38,605 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:43:38,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:43:38,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:43:38,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:43:56,213 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2023-12-02 15:44:11,638 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 574 for LOIs [2023-12-02 15:44:41,883 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 457 for LOIs [2023-12-02 15:44:49,098 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 458 for LOIs [2023-12-02 15:44:56,986 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 460 for LOIs [2023-12-02 15:44:58,418 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2023-12-02 15:44:58,421 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 474 for LOIs [2023-12-02 15:44:59,713 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 38 for LOIs [2023-12-02 15:44:59,788 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 476 for LOIs [2023-12-02 15:45:12,936 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 472 for LOIs [2023-12-02 15:45:14,211 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 452 for LOIs [2023-12-02 15:45:14,827 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 544 for LOIs [2023-12-02 15:45:25,915 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 626 for LOIs [2023-12-02 15:45:30,831 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 518 for LOIs [2023-12-02 15:45:32,419 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:45:47,654 WARN L293 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 562 DAG size of output: 528 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:46:07,328 WARN L293 SmtUtils]: Spent 12.38s on a formula simplification. DAG size of input: 626 DAG size of output: 590 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:46:22,226 WARN L293 SmtUtils]: Spent 14.42s on a formula simplification. DAG size of input: 879 DAG size of output: 678 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:46:58,246 WARN L293 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 452 DAG size of output: 451 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:47:05,579 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 456 DAG size of output: 455 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:47:26,941 WARN L293 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 458 DAG size of output: 458 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:47:35,346 WARN L293 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 460 DAG size of output: 460 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:47:48,120 WARN L293 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 501 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)