./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX --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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:03,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:03,786 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:00:03,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:03,797 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:03,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:03,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:03,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:03,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:03,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:03,842 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:03,842 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:03,843 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:03,845 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:03,846 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:03,846 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:03,847 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:03,847 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:03,848 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:03,848 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:03,849 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:03,850 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:03,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:03,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:03,852 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:00:03,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:03,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:00:03,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:03,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:03,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:03,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:03,856 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:00:03,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:03,857 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:03,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:03,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:03,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:03,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:03,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:03,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:03,859 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:03,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:03,859 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:03,860 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:03,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:03,861 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_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2023-11-12 01:00:04,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:04,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:04,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:04,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:04,240 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:04,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-11-12 01:00:08,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:08,446 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:08,450 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2023-11-12 01:00:08,485 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/data/a8c042362/6c901426a6e54190a13fe28edc618d0e/FLAGddc3f47c0 [2023-11-12 01:00:08,509 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/data/a8c042362/6c901426a6e54190a13fe28edc618d0e [2023-11-12 01:00:08,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:08,516 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:08,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:08,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:08,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:08,530 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:08" (1/1) ... [2023-11-12 01:00:08,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cd4f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:08, skipping insertion in model container [2023-11-12 01:00:08,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:08" (1/1) ... [2023-11-12 01:00:08,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:09,119 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_68b7298a-3919-48ca-baaf-33ed228c460e/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2023-11-12 01:00:09,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:09,512 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:09,528 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-12 01:00:09,530 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [147] [2023-11-12 01:00:09,531 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [165] [2023-11-12 01:00:09,531 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [832] [2023-11-12 01:00:09,532 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [952] [2023-11-12 01:00:09,532 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [961] [2023-11-12 01:00:09,533 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2023-11-12 01:00:09,534 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2442] [2023-11-12 01:00:09,534 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2790] [2023-11-12 01:00:09,535 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2976] [2023-11-12 01:00:09,581 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_68b7298a-3919-48ca-baaf-33ed228c460e/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2023-11-12 01:00:09,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:09,697 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:09,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09 WrapperNode [2023-11-12 01:00:09,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:09,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:09,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:09,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:09,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,814 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 807 [2023-11-12 01:00:09,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:09,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:09,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:09,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:09,827 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,903 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,937 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:09,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:09,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:09,994 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:09,994 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:09,995 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (1/1) ... [2023-11-12 01:00:10,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:10,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:10,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:10,110 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-12 01:00:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-12 01:00:10,110 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 01:00:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 01:00:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 01:00:10,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 01:00:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-12 01:00:10,112 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-12 01:00:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 01:00:10,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 01:00:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 01:00:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 01:00:10,114 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 01:00:10,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 01:00:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 01:00:10,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 01:00:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 01:00:10,119 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 01:00:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 01:00:10,119 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 01:00:10,119 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 01:00:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 01:00:10,120 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-12 01:00:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-12 01:00:10,120 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 01:00:10,120 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 01:00:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-12 01:00:10,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-12 01:00:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 01:00:10,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 01:00:10,121 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 01:00:10,122 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 01:00:10,122 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 01:00:10,122 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 01:00:10,122 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 01:00:10,122 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 01:00:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 01:00:10,123 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 01:00:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 01:00:10,123 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 01:00:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 01:00:10,124 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 01:00:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 01:00:10,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 01:00:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:10,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 01:00:10,125 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 01:00:10,345 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:10,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:11,891 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:13,087 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:13,088 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:00:13,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:13 BoogieIcfgContainer [2023-11-12 01:00:13,095 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:13,099 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:13,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:13,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:13,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:08" (1/3) ... [2023-11-12 01:00:13,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd7918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:13, skipping insertion in model container [2023-11-12 01:00:13,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:09" (2/3) ... [2023-11-12 01:00:13,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd7918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:13, skipping insertion in model container [2023-11-12 01:00:13,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:13" (3/3) ... [2023-11-12 01:00:13,112 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2023-11-12 01:00:13,140 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:13,141 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:13,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:13,262 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;@7b7494ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:13,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-12 01:00:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 01:00:13,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:13,319 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] [2023-11-12 01:00:13,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:13,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash 381205060, now seen corresponding path program 1 times [2023-11-12 01:00:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:13,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705737147] [2023-11-12 01:00:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:14,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:14,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705737147] [2023-11-12 01:00:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705737147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:14,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:00:14,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429862729] [2023-11-12 01:00:14,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:14,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:14,724 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 01:00:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:15,691 INFO L93 Difference]: Finished difference Result 1056 states and 1711 transitions. [2023-11-12 01:00:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2023-11-12 01:00:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:15,735 INFO L225 Difference]: With dead ends: 1056 [2023-11-12 01:00:15,737 INFO L226 Difference]: Without dead ends: 681 [2023-11-12 01:00:15,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:15,760 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 488 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:15,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1690 Invalid, 325 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:00:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-11-12 01:00:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2023-11-12 01:00:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 457 states have (on average 1.5229759299781183) internal successors, (696), 487 states have internal predecessors, (696), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2023-11-12 01:00:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1053 transitions. [2023-11-12 01:00:15,930 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1053 transitions. Word has length 63 [2023-11-12 01:00:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:15,931 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1053 transitions. [2023-11-12 01:00:15,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 01:00:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1053 transitions. [2023-11-12 01:00:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 01:00:15,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:15,938 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, 1, 1, 1] [2023-11-12 01:00:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:15,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:15,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2137391340, now seen corresponding path program 1 times [2023-11-12 01:00:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:15,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894490842] [2023-11-12 01:00:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:16,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894490842] [2023-11-12 01:00:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894490842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:16,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:16,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:00:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222937227] [2023-11-12 01:00:16,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:16,500 INFO L87 Difference]: Start difference. First operand 675 states and 1053 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 01:00:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:16,930 INFO L93 Difference]: Finished difference Result 1298 states and 2075 transitions. [2023-11-12 01:00:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2023-11-12 01:00:16,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:16,942 INFO L225 Difference]: With dead ends: 1298 [2023-11-12 01:00:16,942 INFO L226 Difference]: Without dead ends: 865 [2023-11-12 01:00:16,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:16,949 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 139 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:16,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1704 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:00:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-12 01:00:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 771. [2023-11-12 01:00:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 507 states have (on average 1.514792899408284) internal successors, (768), 550 states have internal predecessors, (768), 223 states have call successors, (223), 43 states have call predecessors, (223), 40 states have return successors, (228), 214 states have call predecessors, (228), 219 states have call successors, (228) [2023-11-12 01:00:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1219 transitions. [2023-11-12 01:00:17,049 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1219 transitions. Word has length 68 [2023-11-12 01:00:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:17,050 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1219 transitions. [2023-11-12 01:00:17,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 01:00:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1219 transitions. [2023-11-12 01:00:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 01:00:17,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:17,054 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] [2023-11-12 01:00:17,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:00:17,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:17,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -524615230, now seen corresponding path program 1 times [2023-11-12 01:00:17,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:17,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503257002] [2023-11-12 01:00:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:00:17,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503257002] [2023-11-12 01:00:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503257002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:17,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067623640] [2023-11-12 01:00:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:17,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:17,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:18,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:00:18,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:18,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067623640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:18,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:18,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-12 01:00:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159842103] [2023-11-12 01:00:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:18,440 INFO L87 Difference]: Start difference. First operand 771 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 01:00:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:19,298 INFO L93 Difference]: Finished difference Result 1305 states and 2073 transitions. [2023-11-12 01:00:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:00:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-11-12 01:00:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:19,307 INFO L225 Difference]: With dead ends: 1305 [2023-11-12 01:00:19,307 INFO L226 Difference]: Without dead ends: 779 [2023-11-12 01:00:19,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:19,314 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 483 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:19,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1636 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:00:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2023-11-12 01:00:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 775. [2023-11-12 01:00:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 509 states have (on average 1.512770137524558) internal successors, (770), 553 states have internal predecessors, (770), 223 states have call successors, (223), 44 states have call predecessors, (223), 42 states have return successors, (229), 214 states have call predecessors, (229), 219 states have call successors, (229) [2023-11-12 01:00:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1222 transitions. [2023-11-12 01:00:19,410 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1222 transitions. Word has length 72 [2023-11-12 01:00:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:19,412 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1222 transitions. [2023-11-12 01:00:19,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-12 01:00:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1222 transitions. [2023-11-12 01:00:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 01:00:19,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:19,416 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] [2023-11-12 01:00:19,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:19,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1933428857, now seen corresponding path program 1 times [2023-11-12 01:00:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446241290] [2023-11-12 01:00:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:00:20,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446241290] [2023-11-12 01:00:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446241290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326813235] [2023-11-12 01:00:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:20,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:20,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:20,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:20,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:00:20,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:20,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326813235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:20,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:20,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-12 01:00:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253966569] [2023-11-12 01:00:20,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:00:20,789 INFO L87 Difference]: Start difference. First operand 775 states and 1222 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 01:00:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:21,124 INFO L93 Difference]: Finished difference Result 1404 states and 2250 transitions. [2023-11-12 01:00:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-11-12 01:00:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:21,133 INFO L225 Difference]: With dead ends: 1404 [2023-11-12 01:00:21,133 INFO L226 Difference]: Without dead ends: 775 [2023-11-12 01:00:21,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:21,140 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 266 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1543 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-11-12 01:00:21,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2023-11-12 01:00:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 509 states have (on average 1.4852652259332024) internal successors, (756), 553 states have internal predecessors, (756), 223 states have call successors, (223), 44 states have call predecessors, (223), 42 states have return successors, (229), 214 states have call predecessors, (229), 219 states have call successors, (229) [2023-11-12 01:00:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1208 transitions. [2023-11-12 01:00:21,231 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1208 transitions. Word has length 73 [2023-11-12 01:00:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:21,232 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1208 transitions. [2023-11-12 01:00:21,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-12 01:00:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1208 transitions. [2023-11-12 01:00:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 01:00:21,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:21,240 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 01:00:21,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:21,449 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:21,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1379315128, now seen corresponding path program 1 times [2023-11-12 01:00:21,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:21,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440806455] [2023-11-12 01:00:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:21,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:00:21,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440806455] [2023-11-12 01:00:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440806455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45989549] [2023-11-12 01:00:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:21,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:21,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:21,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:21,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:22,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:00:22,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:00:22,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:00:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45989549] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:22,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:00:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2023-11-12 01:00:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237773834] [2023-11-12 01:00:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:00:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:00:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:00:22,767 INFO L87 Difference]: Start difference. First operand 775 states and 1208 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 01:00:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:26,471 INFO L93 Difference]: Finished difference Result 1882 states and 3026 transitions. [2023-11-12 01:00:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 01:00:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2023-11-12 01:00:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:26,488 INFO L225 Difference]: With dead ends: 1882 [2023-11-12 01:00:26,488 INFO L226 Difference]: Without dead ends: 1430 [2023-11-12 01:00:26,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2023-11-12 01:00:26,497 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 2802 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2881 SdHoareTripleChecker+Valid, 2538 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:26,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2881 Valid, 2538 Invalid, 3032 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1258 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 01:00:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2023-11-12 01:00:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1183. [2023-11-12 01:00:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 822 states have (on average 1.5036496350364963) internal successors, (1236), 869 states have internal predecessors, (1236), 288 states have call successors, (288), 73 states have call predecessors, (288), 72 states have return successors, (325), 276 states have call predecessors, (325), 283 states have call successors, (325) [2023-11-12 01:00:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1849 transitions. [2023-11-12 01:00:26,618 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1849 transitions. Word has length 75 [2023-11-12 01:00:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:26,620 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 1849 transitions. [2023-11-12 01:00:26,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 01:00:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1849 transitions. [2023-11-12 01:00:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 01:00:26,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:26,624 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 01:00:26,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:26,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:26,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 36172010, now seen corresponding path program 1 times [2023-11-12 01:00:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:26,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231203202] [2023-11-12 01:00:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:00:27,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231203202] [2023-11-12 01:00:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231203202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:27,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439627563] [2023-11-12 01:00:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:27,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:27,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:27,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:00:27,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:27,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:27,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439627563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:27,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:27,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 01:00:27,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260482623] [2023-11-12 01:00:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:27,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:27,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:27,731 INFO L87 Difference]: Start difference. First operand 1183 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 01:00:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:28,079 INFO L93 Difference]: Finished difference Result 3386 states and 5439 transitions. [2023-11-12 01:00:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:28,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-11-12 01:00:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:28,100 INFO L225 Difference]: With dead ends: 3386 [2023-11-12 01:00:28,101 INFO L226 Difference]: Without dead ends: 2215 [2023-11-12 01:00:28,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:28,112 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 458 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:28,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1308 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2023-11-12 01:00:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2159. [2023-11-12 01:00:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1510 states have (on average 1.5119205298013245) internal successors, (2283), 1605 states have internal predecessors, (2283), 512 states have call successors, (512), 131 states have call predecessors, (512), 136 states have return successors, (604), 494 states have call predecessors, (604), 507 states have call successors, (604) [2023-11-12 01:00:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3399 transitions. [2023-11-12 01:00:28,325 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3399 transitions. Word has length 76 [2023-11-12 01:00:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:28,326 INFO L495 AbstractCegarLoop]: Abstraction has 2159 states and 3399 transitions. [2023-11-12 01:00:28,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-12 01:00:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3399 transitions. [2023-11-12 01:00:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 01:00:28,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:28,335 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, 1] [2023-11-12 01:00:28,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 01:00:28,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:28,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:28,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash 947611807, now seen corresponding path program 1 times [2023-11-12 01:00:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:28,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220430508] [2023-11-12 01:00:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:28,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:00:29,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:29,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220430508] [2023-11-12 01:00:29,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220430508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:29,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651908276] [2023-11-12 01:00:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:29,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:29,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:29,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:00:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:29,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:00:29,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:00:29,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651908276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:29,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:29,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 01:00:29,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713705412] [2023-11-12 01:00:29,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:29,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:29,436 INFO L87 Difference]: Start difference. First operand 2159 states and 3399 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 01:00:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:29,810 INFO L93 Difference]: Finished difference Result 5054 states and 8065 transitions. [2023-11-12 01:00:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-12 01:00:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:29,839 INFO L225 Difference]: With dead ends: 5054 [2023-11-12 01:00:29,840 INFO L226 Difference]: Without dead ends: 2907 [2023-11-12 01:00:29,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:00:29,858 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 520 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:29,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1004 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2023-11-12 01:00:30,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2863. [2023-11-12 01:00:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (795), 646 states have call predecessors, (795), 662 states have call successors, (795) [2023-11-12 01:00:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4526 transitions. [2023-11-12 01:00:30,222 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4526 transitions. Word has length 75 [2023-11-12 01:00:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:30,222 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 4526 transitions. [2023-11-12 01:00:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-12 01:00:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4526 transitions. [2023-11-12 01:00:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-12 01:00:30,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:30,226 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 01:00:30,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:30,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 01:00:30,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:30,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1328908982, now seen corresponding path program 1 times [2023-11-12 01:00:30,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:30,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523962550] [2023-11-12 01:00:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:00:30,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523962550] [2023-11-12 01:00:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523962550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995813297] [2023-11-12 01:00:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:30,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:30,840 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:30,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:00:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:31,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:00:31,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:00:31,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995813297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:31,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:31,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-12 01:00:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753627862] [2023-11-12 01:00:31,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:31,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:31,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:31,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:31,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:31,389 INFO L87 Difference]: Start difference. First operand 2863 states and 4526 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 01:00:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:32,173 INFO L93 Difference]: Finished difference Result 5145 states and 8164 transitions. [2023-11-12 01:00:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2023-11-12 01:00:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:32,199 INFO L225 Difference]: With dead ends: 5145 [2023-11-12 01:00:32,199 INFO L226 Difference]: Without dead ends: 2871 [2023-11-12 01:00:32,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:00:32,216 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 396 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:32,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:00:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2023-11-12 01:00:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2863. [2023-11-12 01:00:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (791), 646 states have call predecessors, (791), 662 states have call successors, (791) [2023-11-12 01:00:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4522 transitions. [2023-11-12 01:00:32,524 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4522 transitions. Word has length 79 [2023-11-12 01:00:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:32,525 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 4522 transitions. [2023-11-12 01:00:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 01:00:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4522 transitions. [2023-11-12 01:00:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 01:00:32,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:32,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:32,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:32,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:32,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 33869413, now seen corresponding path program 1 times [2023-11-12 01:00:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:32,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077597271] [2023-11-12 01:00:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 01:00:33,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077597271] [2023-11-12 01:00:33,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077597271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:33,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063480989] [2023-11-12 01:00:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:33,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:33,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:33,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:00:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:33,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:00:33,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 01:00:33,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063480989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:33,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-12 01:00:33,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567102105] [2023-11-12 01:00:33,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:33,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:33,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:33,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:33,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:33,552 INFO L87 Difference]: Start difference. First operand 2863 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 01:00:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:33,918 INFO L93 Difference]: Finished difference Result 5394 states and 8643 transitions. [2023-11-12 01:00:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:00:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-11-12 01:00:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:33,944 INFO L225 Difference]: With dead ends: 5394 [2023-11-12 01:00:33,944 INFO L226 Difference]: Without dead ends: 2971 [2023-11-12 01:00:33,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:33,965 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 13 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:33,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2200 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2023-11-12 01:00:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2928. [2023-11-12 01:00:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2057 states have (on average 1.5119105493437044) internal successors, (3110), 2195 states have internal predecessors, (3110), 674 states have call successors, (674), 170 states have call predecessors, (674), 196 states have return successors, (860), 658 states have call predecessors, (860), 669 states have call successors, (860) [2023-11-12 01:00:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4644 transitions. [2023-11-12 01:00:34,227 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4644 transitions. Word has length 99 [2023-11-12 01:00:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:34,228 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 4644 transitions. [2023-11-12 01:00:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 01:00:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4644 transitions. [2023-11-12 01:00:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 01:00:34,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:34,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:34,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:34,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:34,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:34,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash -293798570, now seen corresponding path program 1 times [2023-11-12 01:00:34,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:34,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074620638] [2023-11-12 01:00:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:34,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:34,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074620638] [2023-11-12 01:00:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074620638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618315646] [2023-11-12 01:00:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:34,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:34,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:00:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:35,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:00:35,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:00:35,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618315646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:35,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:35,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-12 01:00:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703731998] [2023-11-12 01:00:35,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:35,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:35,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:35,464 INFO L87 Difference]: Start difference. First operand 2928 states and 4644 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-12 01:00:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:35,901 INFO L93 Difference]: Finished difference Result 6622 states and 10729 transitions. [2023-11-12 01:00:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2023-11-12 01:00:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:35,937 INFO L225 Difference]: With dead ends: 6622 [2023-11-12 01:00:35,937 INFO L226 Difference]: Without dead ends: 3706 [2023-11-12 01:00:35,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:35,958 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 526 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:35,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1232 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2023-11-12 01:00:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3643. [2023-11-12 01:00:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2570 states have (on average 1.5140077821011673) internal successors, (3891), 2742 states have internal predecessors, (3891), 830 states have call successors, (830), 207 states have call predecessors, (830), 242 states have return successors, (1064), 813 states have call predecessors, (1064), 825 states have call successors, (1064) [2023-11-12 01:00:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5785 transitions. [2023-11-12 01:00:36,294 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5785 transitions. Word has length 117 [2023-11-12 01:00:36,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:36,295 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5785 transitions. [2023-11-12 01:00:36,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-12 01:00:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5785 transitions. [2023-11-12 01:00:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-12 01:00:36,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:36,305 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:36,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:36,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:00:36,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:36,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2126219689, now seen corresponding path program 1 times [2023-11-12 01:00:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:36,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8266897] [2023-11-12 01:00:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 01:00:37,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8266897] [2023-11-12 01:00:37,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8266897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128126103] [2023-11-12 01:00:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:37,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:37,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:37,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:00:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:37,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 01:00:37,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 01:00:37,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128126103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:37,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-12 01:00:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336673005] [2023-11-12 01:00:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:37,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:37,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:37,544 INFO L87 Difference]: Start difference. First operand 3643 states and 5785 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-12 01:00:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:37,966 INFO L93 Difference]: Finished difference Result 7330 states and 11833 transitions. [2023-11-12 01:00:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2023-11-12 01:00:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:38,002 INFO L225 Difference]: With dead ends: 7330 [2023-11-12 01:00:38,003 INFO L226 Difference]: Without dead ends: 3699 [2023-11-12 01:00:38,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:00:38,024 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 457 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:38,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1479 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2023-11-12 01:00:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3643. [2023-11-12 01:00:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2570 states have (on average 1.5116731517509727) internal successors, (3885), 2742 states have internal predecessors, (3885), 830 states have call successors, (830), 207 states have call predecessors, (830), 242 states have return successors, (1064), 813 states have call predecessors, (1064), 825 states have call successors, (1064) [2023-11-12 01:00:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5779 transitions. [2023-11-12 01:00:38,362 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5779 transitions. Word has length 118 [2023-11-12 01:00:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:38,362 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 5779 transitions. [2023-11-12 01:00:38,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-11-12 01:00:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5779 transitions. [2023-11-12 01:00:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-12 01:00:38,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:38,371 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:38,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:38,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:38,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:38,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1626501346, now seen corresponding path program 1 times [2023-11-12 01:00:38,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:38,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401109284] [2023-11-12 01:00:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 01:00:38,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401109284] [2023-11-12 01:00:38,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401109284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154714177] [2023-11-12 01:00:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:38,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:38,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:38,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:38,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:00:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:39,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:00:39,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 01:00:39,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154714177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:39,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:39,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-12 01:00:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109924088] [2023-11-12 01:00:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:00:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:00:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:00:39,549 INFO L87 Difference]: Start difference. First operand 3643 states and 5779 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-12 01:00:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:43,062 INFO L93 Difference]: Finished difference Result 8184 states and 13170 transitions. [2023-11-12 01:00:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 01:00:43,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2023-11-12 01:00:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:43,103 INFO L225 Difference]: With dead ends: 8184 [2023-11-12 01:00:43,104 INFO L226 Difference]: Without dead ends: 4437 [2023-11-12 01:00:43,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-12 01:00:43,116 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 1331 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:43,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1412 Valid, 1633 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-12 01:00:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2023-11-12 01:00:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 3702. [2023-11-12 01:00:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 2605 states have (on average 1.509021113243762) internal successors, (3931), 2781 states have internal predecessors, (3931), 853 states have call successors, (853), 207 states have call predecessors, (853), 243 states have return successors, (1118), 833 states have call predecessors, (1118), 848 states have call successors, (1118) [2023-11-12 01:00:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 5902 transitions. [2023-11-12 01:00:43,458 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 5902 transitions. Word has length 117 [2023-11-12 01:00:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:43,458 INFO L495 AbstractCegarLoop]: Abstraction has 3702 states and 5902 transitions. [2023-11-12 01:00:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-12 01:00:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 5902 transitions. [2023-11-12 01:00:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:00:43,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:43,471 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:43,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:43,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:43,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:43,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 105963975, now seen corresponding path program 1 times [2023-11-12 01:00:43,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:43,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198425819] [2023-11-12 01:00:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:44,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198425819] [2023-11-12 01:00:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198425819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:44,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060994445] [2023-11-12 01:00:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:44,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:44,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:44,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 01:00:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:44,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:00:44,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 01:00:44,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060994445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:44,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-12 01:00:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913385075] [2023-11-12 01:00:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:44,689 INFO L87 Difference]: Start difference. First operand 3702 states and 5902 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 01:00:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:45,814 INFO L93 Difference]: Finished difference Result 7680 states and 12516 transitions. [2023-11-12 01:00:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:00:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2023-11-12 01:00:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:45,853 INFO L225 Difference]: With dead ends: 7680 [2023-11-12 01:00:45,853 INFO L226 Difference]: Without dead ends: 4571 [2023-11-12 01:00:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:00:45,871 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 571 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1301 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:00:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2023-11-12 01:00:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4462. [2023-11-12 01:00:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4462 states, 3045 states have (on average 1.4972085385878489) internal successors, (4559), 3269 states have internal predecessors, (4559), 1108 states have call successors, (1108), 279 states have call predecessors, (1108), 308 states have return successors, (1454), 1081 states have call predecessors, (1454), 1101 states have call successors, (1454) [2023-11-12 01:00:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4462 states to 4462 states and 7121 transitions. [2023-11-12 01:00:46,332 INFO L78 Accepts]: Start accepts. Automaton has 4462 states and 7121 transitions. Word has length 123 [2023-11-12 01:00:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:46,332 INFO L495 AbstractCegarLoop]: Abstraction has 4462 states and 7121 transitions. [2023-11-12 01:00:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-12 01:00:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4462 states and 7121 transitions. [2023-11-12 01:00:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 01:00:46,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:46,344 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:46,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:46,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:46,553 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:46,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1414632865, now seen corresponding path program 1 times [2023-11-12 01:00:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:46,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414139635] [2023-11-12 01:00:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:46,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:47,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414139635] [2023-11-12 01:00:47,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414139635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:47,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445799500] [2023-11-12 01:00:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:47,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:47,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:47,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b7298a-3919-48ca-baaf-33ed228c460e/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 01:00:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:47,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:00:47,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 01:00:47,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445799500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-11-12 01:00:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171750989] [2023-11-12 01:00:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:47,597 INFO L87 Difference]: Start difference. First operand 4462 states and 7121 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21)