./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.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_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/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_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/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_930f02ba-710f-42ec-86e6-fdb608f7af4c/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 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:02:17,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:02:17,803 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:02:17,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:02:17,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:02:17,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:02:17,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:02:17,832 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:02:17,833 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:02:17,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:02:17,834 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:02:17,835 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:02:17,835 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:02:17,836 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:02:17,836 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:02:17,837 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:02:17,837 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:02:17,838 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:02:17,838 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:02:17,839 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:02:17,840 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:02:17,841 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:02:17,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:02:17,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:02:17,842 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:02:17,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:02:17,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:02:17,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:02:17,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:02:17,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:02:17,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:02:17,845 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:02:17,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:02:17,846 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:02:17,846 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:02:17,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:02:17,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:02:17,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:02:17,847 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:02:17,847 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:02:17,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:02:17,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:02:17,849 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_930f02ba-710f-42ec-86e6-fdb608f7af4c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2023-12-02 16:02:18,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:02:18,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:02:18,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:02:18,073 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:02:18,073 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:02:18,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2023-12-02 16:02:20,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:02:21,156 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:02:21,156 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2023-12-02 16:02:21,177 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/data/979a209ac/8ce882dfa48a40edae7a6bde6ffd62dd/FLAG9780bc44f [2023-12-02 16:02:21,191 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/data/979a209ac/8ce882dfa48a40edae7a6bde6ffd62dd [2023-12-02 16:02:21,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:02:21,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:02:21,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:02:21,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:02:21,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:02:21,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698e4e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21, skipping insertion in model container [2023-12-02 16:02:21,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,286 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:02:21,692 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_930f02ba-710f-42ec-86e6-fdb608f7af4c/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2023-12-02 16:02:21,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:02:21,731 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:02:21,738 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [48] [2023-12-02 16:02:21,739 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [86] [2023-12-02 16:02:21,740 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [100] [2023-12-02 16:02:21,740 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [286] [2023-12-02 16:02:21,740 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1765] [2023-12-02 16:02:21,740 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1884] [2023-12-02 16:02:21,740 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2546] [2023-12-02 16:02:21,741 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2638] [2023-12-02 16:02:21,741 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3004] [2023-12-02 16:02:21,741 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3013] [2023-12-02 16:02:21,820 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_930f02ba-710f-42ec-86e6-fdb608f7af4c/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2023-12-02 16:02:21,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:02:21,850 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:02:21,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21 WrapperNode [2023-12-02 16:02:21,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:02:21,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:02:21,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:02:21,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:02:21,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,976 INFO L138 Inliner]: procedures = 91, calls = 334, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 845 [2023-12-02 16:02:21,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:02:21,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:02:21,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:02:21,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:02:21,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:21,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,035 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:02:22,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:02:22,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:02:22,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:02:22,047 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (1/1) ... [2023-12-02 16:02:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:02:22,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:22,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:02:22,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:02:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:02:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 16:02:22,123 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 16:02:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 16:02:22,123 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 16:02:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 16:02:22,123 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 16:02:22,123 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 16:02:22,124 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 16:02:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 16:02:22,124 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 16:02:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 16:02:22,124 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 16:02:22,124 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 16:02:22,124 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 16:02:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 16:02:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 16:02:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 16:02:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 16:02:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 16:02:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 16:02:22,125 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 16:02:22,125 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 16:02:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 16:02:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 16:02:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 16:02:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 16:02:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 16:02:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 16:02:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 16:02:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 16:02:22,126 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 16:02:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 16:02:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 16:02:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 16:02:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:02:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 16:02:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 16:02:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 16:02:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 16:02:22,127 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 16:02:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 16:02:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:02:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:02:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 16:02:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 16:02:22,275 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:02:22,278 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:02:23,200 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:02:23,904 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:02:23,904 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:02:23,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:02:23 BoogieIcfgContainer [2023-12-02 16:02:23,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:02:23,909 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:02:23,909 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:02:23,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:02:23,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:02:21" (1/3) ... [2023-12-02 16:02:23,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3f7de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:02:23, skipping insertion in model container [2023-12-02 16:02:23,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:02:21" (2/3) ... [2023-12-02 16:02:23,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3f7de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:02:23, skipping insertion in model container [2023-12-02 16:02:23,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:02:23" (3/3) ... [2023-12-02 16:02:23,915 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product25.cil.c [2023-12-02 16:02:23,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:02:23,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:02:23,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:02:24,000 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;@1fbdf7f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:02:24,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:02:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-02 16:02:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 16:02:24,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:24,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:24,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:24,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1212474579, now seen corresponding path program 1 times [2023-12-02 16:02:24,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:24,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280061816] [2023-12-02 16:02:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:02:24,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:24,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280061816] [2023-12-02 16:02:24,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280061816] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:24,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:24,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:02:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023860761] [2023-12-02 16:02:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:24,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:02:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:02:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:02:24,429 INFO L87 Difference]: Start difference. First operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 16:02:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:24,563 INFO L93 Difference]: Finished difference Result 365 states and 586 transitions. [2023-12-02 16:02:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:02:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2023-12-02 16:02:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:24,581 INFO L225 Difference]: With dead ends: 365 [2023-12-02 16:02:24,581 INFO L226 Difference]: Without dead ends: 343 [2023-12-02 16:02:24,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:02:24,587 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:24,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 517 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:02:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-12-02 16:02:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2023-12-02 16:02:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 234 states have (on average 1.6111111111111112) internal successors, (377), 253 states have internal predecessors, (377), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2023-12-02 16:02:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 548 transitions. [2023-12-02 16:02:24,658 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 548 transitions. Word has length 51 [2023-12-02 16:02:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:24,660 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 548 transitions. [2023-12-02 16:02:24,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 16:02:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 548 transitions. [2023-12-02 16:02:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 16:02:24,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:24,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:02:24,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:24,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -949510519, now seen corresponding path program 1 times [2023-12-02 16:02:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:24,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61921102] [2023-12-02 16:02:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:02:25,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61921102] [2023-12-02 16:02:25,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61921102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:25,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:25,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:02:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919595418] [2023-12-02 16:02:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:02:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:02:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:02:25,046 INFO L87 Difference]: Start difference. First operand 343 states and 548 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:02:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:27,413 INFO L93 Difference]: Finished difference Result 1160 states and 1889 transitions. [2023-12-02 16:02:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:02:27,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2023-12-02 16:02:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:27,422 INFO L225 Difference]: With dead ends: 1160 [2023-12-02 16:02:27,423 INFO L226 Difference]: Without dead ends: 833 [2023-12-02 16:02:27,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:02:27,429 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1625 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:27,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 1629 Invalid, 2710 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [477 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 16:02:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-12-02 16:02:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2023-12-02 16:02:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 555 states have (on average 1.6396396396396395) internal successors, (910), 590 states have internal predecessors, (910), 185 states have call successors, (185), 41 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2023-12-02 16:02:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1281 transitions. [2023-12-02 16:02:27,508 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1281 transitions. Word has length 52 [2023-12-02 16:02:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:27,508 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1281 transitions. [2023-12-02 16:02:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:02:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1281 transitions. [2023-12-02 16:02:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 16:02:27,512 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:27,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:02:27,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:27,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1054847902, now seen corresponding path program 1 times [2023-12-02 16:02:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281495794] [2023-12-02 16:02:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:02:27,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281495794] [2023-12-02 16:02:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281495794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:27,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:27,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:02:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134008204] [2023-12-02 16:02:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:02:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:02:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:02:27,708 INFO L87 Difference]: Start difference. First operand 784 states and 1281 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 16:02:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:27,913 INFO L93 Difference]: Finished difference Result 1320 states and 2163 transitions. [2023-12-02 16:02:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-12-02 16:02:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:27,921 INFO L225 Difference]: With dead ends: 1320 [2023-12-02 16:02:27,921 INFO L226 Difference]: Without dead ends: 854 [2023-12-02 16:02:27,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:02:27,925 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 41 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:27,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2159 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:02:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-12-02 16:02:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 796. [2023-12-02 16:02:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 564 states have (on average 1.6294326241134751) internal successors, (919), 599 states have internal predecessors, (919), 185 states have call successors, (185), 41 states have call predecessors, (185), 46 states have return successors, (192), 180 states have call predecessors, (192), 180 states have call successors, (192) [2023-12-02 16:02:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1296 transitions. [2023-12-02 16:02:27,988 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1296 transitions. Word has length 56 [2023-12-02 16:02:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:27,989 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1296 transitions. [2023-12-02 16:02:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 16:02:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1296 transitions. [2023-12-02 16:02:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 16:02:27,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:27,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:02:27,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:27,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2065427974, now seen corresponding path program 1 times [2023-12-02 16:02:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:27,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802592366] [2023-12-02 16:02:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:27,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:02:28,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:28,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802592366] [2023-12-02 16:02:28,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802592366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:28,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:28,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:02:28,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64798726] [2023-12-02 16:02:28,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:28,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:02:28,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:02:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:02:28,309 INFO L87 Difference]: Start difference. First operand 796 states and 1296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 16:02:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:30,357 INFO L93 Difference]: Finished difference Result 1815 states and 2949 transitions. [2023-12-02 16:02:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:02:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2023-12-02 16:02:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:30,367 INFO L225 Difference]: With dead ends: 1815 [2023-12-02 16:02:30,367 INFO L226 Difference]: Without dead ends: 1241 [2023-12-02 16:02:30,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:02:30,371 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 1817 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:30,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 1323 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 16:02:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-12-02 16:02:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1147. [2023-12-02 16:02:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.58375) internal successors, (1267), 852 states have internal predecessors, (1267), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2023-12-02 16:02:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1829 transitions. [2023-12-02 16:02:30,435 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1829 transitions. Word has length 60 [2023-12-02 16:02:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1829 transitions. [2023-12-02 16:02:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 16:02:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1829 transitions. [2023-12-02 16:02:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:02:30,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:30,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:02:30,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:02:30,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:30,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash -148046946, now seen corresponding path program 1 times [2023-12-02 16:02:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:30,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109699613] [2023-12-02 16:02:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:30,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:02:30,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109699613] [2023-12-02 16:02:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109699613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:30,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:30,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254968569] [2023-12-02 16:02:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:30,597 INFO L87 Difference]: Start difference. First operand 1147 states and 1829 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:02:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:30,838 INFO L93 Difference]: Finished difference Result 2216 states and 3590 transitions. [2023-12-02 16:02:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:02:30,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2023-12-02 16:02:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:30,848 INFO L225 Difference]: With dead ends: 2216 [2023-12-02 16:02:30,848 INFO L226 Difference]: Without dead ends: 1147 [2023-12-02 16:02:30,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:02:30,853 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 210 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:30,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1392 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:02:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-12-02 16:02:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-12-02 16:02:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.54375) internal successors, (1235), 852 states have internal predecessors, (1235), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2023-12-02 16:02:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1797 transitions. [2023-12-02 16:02:30,912 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1797 transitions. Word has length 63 [2023-12-02 16:02:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:30,913 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1797 transitions. [2023-12-02 16:02:30,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 16:02:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1797 transitions. [2023-12-02 16:02:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 16:02:30,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:30,915 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:30,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:02:30,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1524417437, now seen corresponding path program 1 times [2023-12-02 16:02:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125765750] [2023-12-02 16:02:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:02:31,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125765750] [2023-12-02 16:02:31,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125765750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:31,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:31,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:02:31,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131801378] [2023-12-02 16:02:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:31,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:02:31,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:02:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:02:31,143 INFO L87 Difference]: Start difference. First operand 1147 states and 1797 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:02:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:32,840 INFO L93 Difference]: Finished difference Result 2203 states and 3468 transitions. [2023-12-02 16:02:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:02:32,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2023-12-02 16:02:32,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:32,852 INFO L225 Difference]: With dead ends: 2203 [2023-12-02 16:02:32,852 INFO L226 Difference]: Without dead ends: 1335 [2023-12-02 16:02:32,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:02:32,857 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 916 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:32,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1509 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:02:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2023-12-02 16:02:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1174. [2023-12-02 16:02:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 818 states have (on average 1.5366748166259168) internal successors, (1257), 874 states have internal predecessors, (1257), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2023-12-02 16:02:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1831 transitions. [2023-12-02 16:02:32,965 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1831 transitions. Word has length 65 [2023-12-02 16:02:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:32,966 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1831 transitions. [2023-12-02 16:02:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 16:02:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1831 transitions. [2023-12-02 16:02:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 16:02:32,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:32,968 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 16:02:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:02:32,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:32,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1594864941, now seen corresponding path program 1 times [2023-12-02 16:02:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112943490] [2023-12-02 16:02:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:02:33,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112943490] [2023-12-02 16:02:33,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112943490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:33,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:02:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312140632] [2023-12-02 16:02:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:33,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:02:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:02:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:02:33,197 INFO L87 Difference]: Start difference. First operand 1174 states and 1831 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 16:02:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:33,829 INFO L93 Difference]: Finished difference Result 1246 states and 1944 transitions. [2023-12-02 16:02:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2023-12-02 16:02:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:33,841 INFO L225 Difference]: With dead ends: 1246 [2023-12-02 16:02:33,841 INFO L226 Difference]: Without dead ends: 1231 [2023-12-02 16:02:33,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:02:33,843 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 632 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:33,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1657 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:02:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2023-12-02 16:02:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1178. [2023-12-02 16:02:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5340632603406326) internal successors, (1261), 878 states have internal predecessors, (1261), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2023-12-02 16:02:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1835 transitions. [2023-12-02 16:02:33,953 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1835 transitions. Word has length 69 [2023-12-02 16:02:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:33,953 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1835 transitions. [2023-12-02 16:02:33,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 16:02:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1835 transitions. [2023-12-02 16:02:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 16:02:33,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:33,956 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 16:02:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:02:33,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -648753849, now seen corresponding path program 1 times [2023-12-02 16:02:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882795489] [2023-12-02 16:02:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:02:34,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:34,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882795489] [2023-12-02 16:02:34,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882795489] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:02:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019536028] [2023-12-02 16:02:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:02:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:02:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:02:34,183 INFO L87 Difference]: Start difference. First operand 1178 states and 1835 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 16:02:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:34,477 INFO L93 Difference]: Finished difference Result 1197 states and 1859 transitions. [2023-12-02 16:02:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:02:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2023-12-02 16:02:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:34,489 INFO L225 Difference]: With dead ends: 1197 [2023-12-02 16:02:34,489 INFO L226 Difference]: Without dead ends: 1182 [2023-12-02 16:02:34,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:02:34,491 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 257 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:34,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2684 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:02:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2023-12-02 16:02:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1178. [2023-12-02 16:02:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5304136253041363) internal successors, (1258), 878 states have internal predecessors, (1258), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2023-12-02 16:02:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1832 transitions. [2023-12-02 16:02:34,580 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1832 transitions. Word has length 74 [2023-12-02 16:02:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:34,580 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1832 transitions. [2023-12-02 16:02:34,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 16:02:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1832 transitions. [2023-12-02 16:02:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 16:02:34,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:34,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:02:34,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:34,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash 990291659, now seen corresponding path program 1 times [2023-12-02 16:02:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:34,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579765535] [2023-12-02 16:02:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:34,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:02:34,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579765535] [2023-12-02 16:02:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579765535] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:34,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:34,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:34,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318794738] [2023-12-02 16:02:34,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:34,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:34,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:34,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:34,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:34,777 INFO L87 Difference]: Start difference. First operand 1178 states and 1832 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:36,044 INFO L93 Difference]: Finished difference Result 3783 states and 5989 transitions. [2023-12-02 16:02:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2023-12-02 16:02:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:36,061 INFO L225 Difference]: With dead ends: 3783 [2023-12-02 16:02:36,061 INFO L226 Difference]: Without dead ends: 2621 [2023-12-02 16:02:36,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:02:36,067 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1074 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:36,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 645 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:02:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2023-12-02 16:02:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2374. [2023-12-02 16:02:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 1688 states have (on average 1.5408767772511849) internal successors, (2601), 1799 states have internal predecessors, (2601), 526 states have call successors, (526), 129 states have call predecessors, (526), 159 states have return successors, (603), 498 states have call predecessors, (603), 521 states have call successors, (603) [2023-12-02 16:02:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3730 transitions. [2023-12-02 16:02:36,231 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3730 transitions. Word has length 81 [2023-12-02 16:02:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:36,231 INFO L495 AbstractCegarLoop]: Abstraction has 2374 states and 3730 transitions. [2023-12-02 16:02:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3730 transitions. [2023-12-02 16:02:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 16:02:36,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:36,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:36,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:02:36,235 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:36,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1803435771, now seen corresponding path program 1 times [2023-12-02 16:02:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658244293] [2023-12-02 16:02:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:02:36,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658244293] [2023-12-02 16:02:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658244293] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:36,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:36,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160365191] [2023-12-02 16:02:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:36,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:36,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:36,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:36,371 INFO L87 Difference]: Start difference. First operand 2374 states and 3730 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 16:02:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:37,700 INFO L93 Difference]: Finished difference Result 7279 states and 11631 transitions. [2023-12-02 16:02:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2023-12-02 16:02:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:37,742 INFO L225 Difference]: With dead ends: 7279 [2023-12-02 16:02:37,742 INFO L226 Difference]: Without dead ends: 4924 [2023-12-02 16:02:37,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:02:37,760 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 1055 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:37,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 658 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:02:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2023-12-02 16:02:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4608. [2023-12-02 16:02:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 3307 states have (on average 1.5439975808890234) internal successors, (5106), 3540 states have internal predecessors, (5106), 979 states have call successors, (979), 247 states have call predecessors, (979), 321 states have return successors, (1205), 911 states have call predecessors, (1205), 974 states have call successors, (1205) [2023-12-02 16:02:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 7290 transitions. [2023-12-02 16:02:38,206 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 7290 transitions. Word has length 85 [2023-12-02 16:02:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:38,206 INFO L495 AbstractCegarLoop]: Abstraction has 4608 states and 7290 transitions. [2023-12-02 16:02:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 16:02:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 7290 transitions. [2023-12-02 16:02:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 16:02:38,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:38,210 INFO L195 NwaCegarLoop]: trace histogram [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 16:02:38,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:02:38,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:38,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:38,211 INFO L85 PathProgramCache]: Analyzing trace with hash 71517717, now seen corresponding path program 1 times [2023-12-02 16:02:38,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:38,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802752078] [2023-12-02 16:02:38,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:02:38,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802752078] [2023-12-02 16:02:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802752078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508368275] [2023-12-02 16:02:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:38,403 INFO L87 Difference]: Start difference. First operand 4608 states and 7290 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 16:02:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:40,010 INFO L93 Difference]: Finished difference Result 14041 states and 22771 transitions. [2023-12-02 16:02:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2023-12-02 16:02:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:40,061 INFO L225 Difference]: With dead ends: 14041 [2023-12-02 16:02:40,061 INFO L226 Difference]: Without dead ends: 9458 [2023-12-02 16:02:40,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:02:40,081 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 1042 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:40,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 671 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:02:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2023-12-02 16:02:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 8990. [2023-12-02 16:02:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 6474 states have (on average 1.5410874266295953) internal successors, (9977), 6963 states have internal predecessors, (9977), 1858 states have call successors, (1858), 483 states have call predecessors, (1858), 657 states have return successors, (2544), 1710 states have call predecessors, (2544), 1853 states have call successors, (2544) [2023-12-02 16:02:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 14379 transitions. [2023-12-02 16:02:40,809 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 14379 transitions. Word has length 86 [2023-12-02 16:02:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:40,810 INFO L495 AbstractCegarLoop]: Abstraction has 8990 states and 14379 transitions. [2023-12-02 16:02:40,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 16:02:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 14379 transitions. [2023-12-02 16:02:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 16:02:40,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:40,813 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:40,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:02:40,814 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:40,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash -768714363, now seen corresponding path program 1 times [2023-12-02 16:02:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:40,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183101072] [2023-12-02 16:02:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:02:40,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183101072] [2023-12-02 16:02:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183101072] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:40,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:40,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216380992] [2023-12-02 16:02:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:40,998 INFO L87 Difference]: Start difference. First operand 8990 states and 14379 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:43,010 INFO L93 Difference]: Finished difference Result 27335 states and 45579 transitions. [2023-12-02 16:02:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:43,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2023-12-02 16:02:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:43,078 INFO L225 Difference]: With dead ends: 27335 [2023-12-02 16:02:43,078 INFO L226 Difference]: Without dead ends: 18382 [2023-12-02 16:02:43,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:02:43,117 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1035 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:43,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 681 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 16:02:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2023-12-02 16:02:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 17596. [2023-12-02 16:02:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17596 states, 12677 states have (on average 1.5350635008282716) internal successors, (19460), 13702 states have internal predecessors, (19460), 3565 states have call successors, (3565), 955 states have call predecessors, (3565), 1353 states have return successors, (5735), 3257 states have call predecessors, (5735), 3560 states have call successors, (5735) [2023-12-02 16:02:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17596 states to 17596 states and 28760 transitions. [2023-12-02 16:02:44,269 INFO L78 Accepts]: Start accepts. Automaton has 17596 states and 28760 transitions. Word has length 84 [2023-12-02 16:02:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:44,269 INFO L495 AbstractCegarLoop]: Abstraction has 17596 states and 28760 transitions. [2023-12-02 16:02:44,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 17596 states and 28760 transitions. [2023-12-02 16:02:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 16:02:44,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:44,274 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:44,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:02:44,275 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:44,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1939249999, now seen corresponding path program 1 times [2023-12-02 16:02:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258876758] [2023-12-02 16:02:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:02:44,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258876758] [2023-12-02 16:02:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258876758] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:44,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:02:44,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:02:44,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634683243] [2023-12-02 16:02:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:44,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:44,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:44,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:02:44,504 INFO L87 Difference]: Start difference. First operand 17596 states and 28760 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:47,679 INFO L93 Difference]: Finished difference Result 53615 states and 94143 transitions. [2023-12-02 16:02:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 85 [2023-12-02 16:02:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:47,871 INFO L225 Difference]: With dead ends: 53615 [2023-12-02 16:02:47,871 INFO L226 Difference]: Without dead ends: 36070 [2023-12-02 16:02:47,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:02:47,930 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1027 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:47,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 696 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:02:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36070 states. [2023-12-02 16:02:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36070 to 34434. [2023-12-02 16:02:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34434 states, 24860 states have (on average 1.5318986323411101) internal successors, (38083), 26912 states have internal predecessors, (38083), 6877 states have call successors, (6877), 1896 states have call predecessors, (6877), 2696 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:02:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34434 states to 34434 states and 58366 transitions. [2023-12-02 16:02:50,821 INFO L78 Accepts]: Start accepts. Automaton has 34434 states and 58366 transitions. Word has length 85 [2023-12-02 16:02:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:50,821 INFO L495 AbstractCegarLoop]: Abstraction has 34434 states and 58366 transitions. [2023-12-02 16:02:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 16:02:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34434 states and 58366 transitions. [2023-12-02 16:02:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 16:02:50,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:50,828 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:50,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:02:50,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2008961250, now seen corresponding path program 1 times [2023-12-02 16:02:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397237365] [2023-12-02 16:02:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:50,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 16:02:51,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397237365] [2023-12-02 16:02:51,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397237365] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:02:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003053428] [2023-12-02 16:02:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:51,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:51,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:51,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:02:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:51,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 1778 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:02:51,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 16:02:51,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003053428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:51,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:02:51,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 16:02:51,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762072125] [2023-12-02 16:02:51,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:51,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:02:51,497 INFO L87 Difference]: Start difference. First operand 34434 states and 58366 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:02:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:02:54,105 INFO L93 Difference]: Finished difference Result 72595 states and 128120 transitions. [2023-12-02 16:02:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:02:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 131 [2023-12-02 16:02:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:02:54,307 INFO L225 Difference]: With dead ends: 72595 [2023-12-02 16:02:54,307 INFO L226 Difference]: Without dead ends: 38178 [2023-12-02 16:02:54,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:02:54,410 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 213 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:02:54,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1287 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:02:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38178 states. [2023-12-02 16:02:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38178 to 38178. [2023-12-02 16:02:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38178 states, 28508 states have (on average 1.58169636593237) internal successors, (45091), 30560 states have internal predecessors, (45091), 6877 states have call successors, (6877), 1992 states have call predecessors, (6877), 2792 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:02:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38178 states to 38178 states and 65374 transitions. [2023-12-02 16:02:57,034 INFO L78 Accepts]: Start accepts. Automaton has 38178 states and 65374 transitions. Word has length 131 [2023-12-02 16:02:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:02:57,035 INFO L495 AbstractCegarLoop]: Abstraction has 38178 states and 65374 transitions. [2023-12-02 16:02:57,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:02:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38178 states and 65374 transitions. [2023-12-02 16:02:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 16:02:57,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:02:57,041 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:02:57,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:02:57,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:02:57,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:02:57,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:02:57,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1731934125, now seen corresponding path program 1 times [2023-12-02 16:02:57,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:02:57,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29283102] [2023-12-02 16:02:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:57,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:02:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 16:02:57,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:02:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29283102] [2023-12-02 16:02:57,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29283102] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:02:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419265609] [2023-12-02 16:02:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:02:57,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:02:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:02:57,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:02:57,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:02:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:02:57,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:02:57,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:02:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 16:02:57,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:02:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419265609] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:02:57,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:02:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 16:02:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178849351] [2023-12-02 16:02:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:02:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:02:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:02:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:02:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:02:57,959 INFO L87 Difference]: Start difference. First operand 38178 states and 65374 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:00,832 INFO L93 Difference]: Finished difference Result 80083 states and 142037 transitions. [2023-12-02 16:03:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 136 [2023-12-02 16:03:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:01,000 INFO L225 Difference]: With dead ends: 80083 [2023-12-02 16:03:01,001 INFO L226 Difference]: Without dead ends: 41922 [2023-12-02 16:03:01,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:01,097 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 211 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:01,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1287 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41922 states. [2023-12-02 16:03:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41922 to 41922. [2023-12-02 16:03:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41922 states, 32156 states have (on average 1.6201952979226273) internal successors, (52099), 34208 states have internal predecessors, (52099), 6877 states have call successors, (6877), 2088 states have call predecessors, (6877), 2888 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:03:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41922 states to 41922 states and 72382 transitions. [2023-12-02 16:03:03,614 INFO L78 Accepts]: Start accepts. Automaton has 41922 states and 72382 transitions. Word has length 136 [2023-12-02 16:03:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:03,615 INFO L495 AbstractCegarLoop]: Abstraction has 41922 states and 72382 transitions. [2023-12-02 16:03:03,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41922 states and 72382 transitions. [2023-12-02 16:03:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 16:03:03,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:03,623 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:03,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:03:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:03,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:03:03,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2110100819, now seen corresponding path program 1 times [2023-12-02 16:03:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:03,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710159827] [2023-12-02 16:03:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 16:03:03,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710159827] [2023-12-02 16:03:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710159827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571483701] [2023-12-02 16:03:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:03,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:03,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:03,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:03:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:04,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:03:04,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:03:04,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:04,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571483701] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:04,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:04,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 16:03:04,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891942877] [2023-12-02 16:03:04,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:04,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:04,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:04,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:03:04,362 INFO L87 Difference]: Start difference. First operand 41922 states and 72382 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:07,005 INFO L93 Difference]: Finished difference Result 87571 states and 155954 transitions. [2023-12-02 16:03:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2023-12-02 16:03:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:07,147 INFO L225 Difference]: With dead ends: 87571 [2023-12-02 16:03:07,147 INFO L226 Difference]: Without dead ends: 45666 [2023-12-02 16:03:07,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:07,221 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:07,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1287 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45666 states. [2023-12-02 16:03:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45666 to 45666. [2023-12-02 16:03:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45666 states, 35804 states have (on average 1.650849067143336) internal successors, (59107), 37856 states have internal predecessors, (59107), 6877 states have call successors, (6877), 2184 states have call predecessors, (6877), 2984 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:03:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45666 states to 45666 states and 79390 transitions. [2023-12-02 16:03:09,618 INFO L78 Accepts]: Start accepts. Automaton has 45666 states and 79390 transitions. Word has length 140 [2023-12-02 16:03:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:09,618 INFO L495 AbstractCegarLoop]: Abstraction has 45666 states and 79390 transitions. [2023-12-02 16:03:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45666 states and 79390 transitions. [2023-12-02 16:03:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 16:03:09,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:09,629 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:09,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 16:03:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:03:09,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:03:09,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1153769026, now seen corresponding path program 1 times [2023-12-02 16:03:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399442436] [2023-12-02 16:03:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 16:03:11,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399442436] [2023-12-02 16:03:11,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399442436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474185338] [2023-12-02 16:03:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:11,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:11,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:11,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:03:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:11,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:03:11,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 16:03:11,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:11,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474185338] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:11,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:11,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 16:03:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211931758] [2023-12-02 16:03:11,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:03:11,875 INFO L87 Difference]: Start difference. First operand 45666 states and 79390 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:14,488 INFO L93 Difference]: Finished difference Result 95059 states and 169871 transitions. [2023-12-02 16:03:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:14,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 143 [2023-12-02 16:03:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:14,627 INFO L225 Difference]: With dead ends: 95059 [2023-12-02 16:03:14,627 INFO L226 Difference]: Without dead ends: 49410 [2023-12-02 16:03:14,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:03:14,700 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 207 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:14,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1287 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49410 states. [2023-12-02 16:03:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49410 to 49410. [2023-12-02 16:03:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49410 states, 39452 states have (on average 1.67583392476934) internal successors, (66115), 41504 states have internal predecessors, (66115), 6877 states have call successors, (6877), 2280 states have call predecessors, (6877), 3080 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:03:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49410 states to 49410 states and 86398 transitions. [2023-12-02 16:03:17,362 INFO L78 Accepts]: Start accepts. Automaton has 49410 states and 86398 transitions. Word has length 143 [2023-12-02 16:03:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:17,363 INFO L495 AbstractCegarLoop]: Abstraction has 49410 states and 86398 transitions. [2023-12-02 16:03:17,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 16:03:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 49410 states and 86398 transitions. [2023-12-02 16:03:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:03:17,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:17,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:17,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:03:17,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:03:17,569 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:03:17,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:17,570 INFO L85 PathProgramCache]: Analyzing trace with hash 685720400, now seen corresponding path program 1 times [2023-12-02 16:03:17,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:17,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775173312] [2023-12-02 16:03:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:17,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 16:03:17,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775173312] [2023-12-02 16:03:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775173312] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:17,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011830772] [2023-12-02 16:03:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:17,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:17,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:17,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:17,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:03:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:18,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:03:18,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 16:03:18,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011830772] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:18,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:18,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-12-02 16:03:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943032028] [2023-12-02 16:03:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:18,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:18,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:03:18,236 INFO L87 Difference]: Start difference. First operand 49410 states and 86398 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 16:03:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:20,495 INFO L93 Difference]: Finished difference Result 51318 states and 94843 transitions. [2023-12-02 16:03:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2023-12-02 16:03:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:20,660 INFO L225 Difference]: With dead ends: 51318 [2023-12-02 16:03:20,660 INFO L226 Difference]: Without dead ends: 51161 [2023-12-02 16:03:20,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:03:20,681 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 44 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:20,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1564 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51161 states. [2023-12-02 16:03:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51161 to 49596. [2023-12-02 16:03:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49596 states, 39638 states have (on average 1.6726625964983097) internal successors, (66301), 41690 states have internal predecessors, (66301), 6877 states have call successors, (6877), 2280 states have call predecessors, (6877), 3080 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2023-12-02 16:03:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49596 states to 49596 states and 86584 transitions. [2023-12-02 16:03:23,656 INFO L78 Accepts]: Start accepts. Automaton has 49596 states and 86584 transitions. Word has length 145 [2023-12-02 16:03:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:23,656 INFO L495 AbstractCegarLoop]: Abstraction has 49596 states and 86584 transitions. [2023-12-02 16:03:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2023-12-02 16:03:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49596 states and 86584 transitions. [2023-12-02 16:03:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 16:03:23,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:23,671 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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, 1, 1, 1, 1, 1, 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 16:03:23,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:03:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:03:23,872 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:03:23,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1536025285, now seen corresponding path program 1 times [2023-12-02 16:03:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264034108] [2023-12-02 16:03:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-02 16:03:24,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264034108] [2023-12-02 16:03:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264034108] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637226376] [2023-12-02 16:03:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:24,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:24,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_930f02ba-710f-42ec-86e6-fdb608f7af4c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:03:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:24,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 16:03:24,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-12-02 16:03:25,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:29,780 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:03:35,818 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:03:36,135 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:03:42,230 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:03:42,537 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:03:49,308 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:03:49,596 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:03:56,364 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:03:56,480 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 49188 disjunctions. This might take some time... [2023-12-02 16:06:48,023 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 49188 disjunctions.