./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:57:44,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:57:44,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:57:44,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:57:44,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:57:44,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:57:44,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:57:44,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:57:44,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:57:44,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:57:44,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:57:44,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:57:44,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:57:44,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:57:44,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:57:44,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:57:44,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:57:44,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:57:44,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:57:44,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:57:44,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:57:44,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:57:44,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:57:44,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:57:44,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:57:44,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:57:44,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:57:44,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:57:44,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:57:44,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:57:44,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:57:44,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:57:44,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:57:44,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:57:44,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:57:44,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:57:44,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:57:44,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:57:44,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:57:44,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:57:44,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:57:44,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:57:44,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:57:44,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:57:44,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:57:44,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:57:44,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:57:44,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:57:44,763 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:57:44,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:57:44,764 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:57:44,764 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:57:44,764 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:57:44,764 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:57:44,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:57:44,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:57:44,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:44,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:57:44,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:57:44,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5032f6ecc7a7304ce28757cb2a6aad82a2091f27bc978e38426a37817981d0c [2022-12-14 12:57:44,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:57:44,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:57:44,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:57:44,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:57:44,961 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:57:44,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2022-12-14 12:57:47,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:57:47,774 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:57:47,775 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c [2022-12-14 12:57:47,791 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/data/a1d5528ae/b6bb4bc05a28488db83ce6d6ec048846/FLAGa89097d74 [2022-12-14 12:57:47,803 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/data/a1d5528ae/b6bb4bc05a28488db83ce6d6ec048846 [2022-12-14 12:57:47,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:57:47,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:57:47,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:47,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:57:47,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:57:47,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:47" (1/1) ... [2022-12-14 12:57:47,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a66add3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:47, skipping insertion in model container [2022-12-14 12:57:47,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:57:47" (1/1) ... [2022-12-14 12:57:47,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:57:47,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:57:47,994 WARN L237 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_7c1f2149-3426-44eb-a496-8d5b4a75fada/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2022-12-14 12:57:48,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:48,277 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:57:48,287 WARN L237 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_7c1f2149-3426-44eb-a496-8d5b4a75fada/sv-benchmarks/c/product-lines/elevator_spec1_product30.cil.c[1545,1558] [2022-12-14 12:57:48,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:57:48,397 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:57:48,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48 WrapperNode [2022-12-14 12:57:48,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:57:48,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:48,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:57:48,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:57:48,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,475 INFO L138 Inliner]: procedures = 95, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 909 [2022-12-14 12:57:48,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:57:48,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:57:48,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:57:48,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:57:48,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:57:48,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:57:48,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:57:48,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:57:48,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (1/1) ... [2022-12-14 12:57:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:57:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:57:48,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:57:48,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:57:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 12:57:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 12:57:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:57:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 12:57:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 12:57:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 12:57:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 12:57:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 12:57:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 12:57:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 12:57:48,583 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 12:57:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 12:57:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 12:57:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 12:57:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 12:57:48,584 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 12:57:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 12:57:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 12:57:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 12:57:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 12:57:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 12:57:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 12:57:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 12:57:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 12:57:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 12:57:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 12:57:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 12:57:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 12:57:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 12:57:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 12:57:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 12:57:48,587 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 12:57:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 12:57:48,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 12:57:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 12:57:48,587 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 12:57:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:57:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 12:57:48,588 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 12:57:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 12:57:48,588 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 12:57:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 12:57:48,588 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 12:57:48,588 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 12:57:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 12:57:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 12:57:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 12:57:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:57:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:57:48,589 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 12:57:48,589 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 12:57:48,715 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:57:48,717 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:57:49,526 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:57:49,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:57:49,986 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:57:49,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:49 BoogieIcfgContainer [2022-12-14 12:57:49,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:57:49,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:57:49,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:57:49,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:57:49,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:57:47" (1/3) ... [2022-12-14 12:57:49,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f6daed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:49, skipping insertion in model container [2022-12-14 12:57:49,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:57:48" (2/3) ... [2022-12-14 12:57:49,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f6daed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:57:49, skipping insertion in model container [2022-12-14 12:57:49,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:57:49" (3/3) ... [2022-12-14 12:57:49,995 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2022-12-14 12:57:50,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:57:50,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:57:50,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:57:50,055 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=LoopsAndPotentialCycles, 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;@54d2bd27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:57:50,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:57:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2022-12-14 12:57:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:57:50,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:50,076 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] [2022-12-14 12:57:50,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -791523375, now seen corresponding path program 1 times [2022-12-14 12:57:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:50,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641028302] [2022-12-14 12:57:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:57:50,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:50,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641028302] [2022-12-14 12:57:50,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641028302] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:50,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:50,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:57:50,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067735981] [2022-12-14 12:57:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:57:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:57:50,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:57:50,772 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5862068965517242) internal successors, (414), 284 states have internal predecessors, (414), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 12:57:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:52,393 INFO L93 Difference]: Finished difference Result 1260 states and 2036 transitions. [2022-12-14 12:57:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:57:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2022-12-14 12:57:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:52,410 INFO L225 Difference]: With dead ends: 1260 [2022-12-14 12:57:52,410 INFO L226 Difference]: Without dead ends: 887 [2022-12-14 12:57:52,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:57:52,417 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 1241 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:52,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 1112 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:57:52,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-12-14 12:57:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 800. [2022-12-14 12:57:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.6007130124777185) internal successors, (898), 591 states have internal predecessors, (898), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-12-14 12:57:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1286 transitions. [2022-12-14 12:57:52,503 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1286 transitions. Word has length 54 [2022-12-14 12:57:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:52,503 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1286 transitions. [2022-12-14 12:57:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 12:57:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1286 transitions. [2022-12-14 12:57:52,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 12:57:52,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:52,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:52,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:57:52,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:52,509 INFO L85 PathProgramCache]: Analyzing trace with hash -942400081, now seen corresponding path program 1 times [2022-12-14 12:57:52,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:52,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260384592] [2022-12-14 12:57:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:52,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:57:52,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260384592] [2022-12-14 12:57:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260384592] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:52,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:52,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:57:52,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954139504] [2022-12-14 12:57:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:57:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:57:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:57:52,880 INFO L87 Difference]: Start difference. First operand 800 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 12:57:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:53,170 INFO L93 Difference]: Finished difference Result 1767 states and 2881 transitions. [2022-12-14 12:57:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:57:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-12-14 12:57:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:53,179 INFO L225 Difference]: With dead ends: 1767 [2022-12-14 12:57:53,179 INFO L226 Difference]: Without dead ends: 991 [2022-12-14 12:57:53,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:53,186 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 177 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:53,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2332 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:57:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-12-14 12:57:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 806. [2022-12-14 12:57:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 567 states have (on average 1.5943562610229276) internal successors, (904), 597 states have internal predecessors, (904), 193 states have call successors, (193), 44 states have call predecessors, (193), 45 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2022-12-14 12:57:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1292 transitions. [2022-12-14 12:57:53,257 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1292 transitions. Word has length 87 [2022-12-14 12:57:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:53,258 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1292 transitions. [2022-12-14 12:57:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 12:57:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1292 transitions. [2022-12-14 12:57:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 12:57:53,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:53,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:53,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:57:53,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1564790546, now seen corresponding path program 1 times [2022-12-14 12:57:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:53,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036872403] [2022-12-14 12:57:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:57:53,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036872403] [2022-12-14 12:57:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036872403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:53,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:53,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:57:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616081308] [2022-12-14 12:57:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:57:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:57:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:57:53,797 INFO L87 Difference]: Start difference. First operand 806 states and 1292 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 12:57:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:56,216 INFO L93 Difference]: Finished difference Result 2768 states and 4483 transitions. [2022-12-14 12:57:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:57:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2022-12-14 12:57:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:56,225 INFO L225 Difference]: With dead ends: 2768 [2022-12-14 12:57:56,225 INFO L226 Difference]: Without dead ends: 1985 [2022-12-14 12:57:56,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:57:56,229 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1365 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1440 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 5162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:56,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1440 Valid, 2161 Invalid, 5162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:57:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-12-14 12:57:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1798. [2022-12-14 12:57:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1232 states have (on average 1.5665584415584415) internal successors, (1930), 1304 states have internal predecessors, (1930), 474 states have call successors, (474), 79 states have call predecessors, (474), 91 states have return successors, (493), 447 states have call predecessors, (493), 469 states have call successors, (493) [2022-12-14 12:57:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2897 transitions. [2022-12-14 12:57:56,333 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2897 transitions. Word has length 88 [2022-12-14 12:57:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:56,334 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2897 transitions. [2022-12-14 12:57:56,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 12:57:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2897 transitions. [2022-12-14 12:57:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 12:57:56,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:56,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:56,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:57:56,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1061779320, now seen corresponding path program 1 times [2022-12-14 12:57:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:56,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138266087] [2022-12-14 12:57:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:57:56,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:56,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138266087] [2022-12-14 12:57:56,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138266087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:56,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:56,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 12:57:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286030293] [2022-12-14 12:57:56,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:57:56,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:57:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:57:56,632 INFO L87 Difference]: Start difference. First operand 1798 states and 2897 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:57:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:58,757 INFO L93 Difference]: Finished difference Result 5045 states and 8154 transitions. [2022-12-14 12:57:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 12:57:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-12-14 12:57:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:58,771 INFO L225 Difference]: With dead ends: 5045 [2022-12-14 12:57:58,771 INFO L226 Difference]: Without dead ends: 3272 [2022-12-14 12:57:58,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:57:58,778 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1752 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 4025 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1817 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 4025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:58,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1817 Valid, 2610 Invalid, 4631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 4025 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 12:57:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-12-14 12:57:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3110. [2022-12-14 12:57:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2206 states have (on average 1.5897552130553037) internal successors, (3507), 2297 states have internal predecessors, (3507), 732 states have call successors, (732), 141 states have call predecessors, (732), 171 states have return successors, (795), 715 states have call predecessors, (795), 727 states have call successors, (795) [2022-12-14 12:57:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 5034 transitions. [2022-12-14 12:57:59,084 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 5034 transitions. Word has length 89 [2022-12-14 12:57:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:59,085 INFO L495 AbstractCegarLoop]: Abstraction has 3110 states and 5034 transitions. [2022-12-14 12:57:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 6 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:57:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 5034 transitions. [2022-12-14 12:57:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 12:57:59,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:59,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:57:59,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2095705375, now seen corresponding path program 1 times [2022-12-14 12:57:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:59,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126320472] [2022-12-14 12:57:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:57:59,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126320472] [2022-12-14 12:57:59,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126320472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:59,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:59,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:57:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375707811] [2022-12-14 12:57:59,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:59,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:57:59,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:57:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:59,380 INFO L87 Difference]: Start difference. First operand 3110 states and 5034 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:57:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:59,679 INFO L93 Difference]: Finished difference Result 5549 states and 9002 transitions. [2022-12-14 12:57:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:57:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-12-14 12:57:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:59,694 INFO L225 Difference]: With dead ends: 5549 [2022-12-14 12:57:59,694 INFO L226 Difference]: Without dead ends: 3222 [2022-12-14 12:57:59,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:57:59,703 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 6 mSDsluCounter, 2829 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:59,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3404 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:57:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3222 states. [2022-12-14 12:57:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3222 to 3180. [2022-12-14 12:57:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3180 states, 2256 states have (on average 1.5766843971631206) internal successors, (3557), 2347 states have internal predecessors, (3557), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 735 states have call predecessors, (845), 727 states have call successors, (845) [2022-12-14 12:57:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5134 transitions. [2022-12-14 12:57:59,850 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5134 transitions. Word has length 94 [2022-12-14 12:57:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:59,850 INFO L495 AbstractCegarLoop]: Abstraction has 3180 states and 5134 transitions. [2022-12-14 12:57:59,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:57:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5134 transitions. [2022-12-14 12:57:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 12:57:59,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:59,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:59,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:57:59,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2080849153, now seen corresponding path program 1 times [2022-12-14 12:57:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:59,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434867631] [2022-12-14 12:57:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:00,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434867631] [2022-12-14 12:58:00,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434867631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:00,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:00,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:58:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011999151] [2022-12-14 12:58:00,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:00,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:58:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:58:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:00,021 INFO L87 Difference]: Start difference. First operand 3180 states and 5134 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:58:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:00,318 INFO L93 Difference]: Finished difference Result 5655 states and 9142 transitions. [2022-12-14 12:58:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-12-14 12:58:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:00,329 INFO L225 Difference]: With dead ends: 5655 [2022-12-14 12:58:00,329 INFO L226 Difference]: Without dead ends: 3272 [2022-12-14 12:58:00,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:00,337 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:00,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3385 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-12-14 12:58:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 3190. [2022-12-14 12:58:00,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 2266 states have (on average 1.5741394527802295) internal successors, (3567), 2347 states have internal predecessors, (3567), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 745 states have call predecessors, (845), 727 states have call successors, (845) [2022-12-14 12:58:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 5144 transitions. [2022-12-14 12:58:00,463 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 5144 transitions. Word has length 94 [2022-12-14 12:58:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:00,464 INFO L495 AbstractCegarLoop]: Abstraction has 3190 states and 5144 transitions. [2022-12-14 12:58:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:58:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 5144 transitions. [2022-12-14 12:58:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 12:58:00,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:00,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:58:00,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:00,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1940930470, now seen corresponding path program 1 times [2022-12-14 12:58:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:00,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588459490] [2022-12-14 12:58:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:00,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:00,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588459490] [2022-12-14 12:58:00,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588459490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:00,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:00,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:58:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239394730] [2022-12-14 12:58:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:58:00,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:58:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:00,711 INFO L87 Difference]: Start difference. First operand 3190 states and 5144 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:58:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:00,924 INFO L93 Difference]: Finished difference Result 5673 states and 9160 transitions. [2022-12-14 12:58:00,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:58:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2022-12-14 12:58:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:00,935 INFO L225 Difference]: With dead ends: 5673 [2022-12-14 12:58:00,935 INFO L226 Difference]: Without dead ends: 3282 [2022-12-14 12:58:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:00,943 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3385 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:58:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-12-14 12:58:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3200. [2022-12-14 12:58:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 2276 states have (on average 1.5716168717047452) internal successors, (3577), 2347 states have internal predecessors, (3577), 732 states have call successors, (732), 141 states have call predecessors, (732), 191 states have return successors, (845), 755 states have call predecessors, (845), 727 states have call successors, (845) [2022-12-14 12:58:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5154 transitions. [2022-12-14 12:58:01,083 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5154 transitions. Word has length 93 [2022-12-14 12:58:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:01,083 INFO L495 AbstractCegarLoop]: Abstraction has 3200 states and 5154 transitions. [2022-12-14 12:58:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 12:58:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5154 transitions. [2022-12-14 12:58:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 12:58:01,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:01,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:01,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:58:01,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1059961447, now seen corresponding path program 1 times [2022-12-14 12:58:01,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:01,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560993004] [2022-12-14 12:58:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:01,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:01,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:01,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560993004] [2022-12-14 12:58:01,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560993004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:01,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:01,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:58:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346553207] [2022-12-14 12:58:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:01,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:58:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:58:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:58:01,301 INFO L87 Difference]: Start difference. First operand 3200 states and 5154 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-12-14 12:58:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:02,983 INFO L93 Difference]: Finished difference Result 7984 states and 12948 transitions. [2022-12-14 12:58:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:58:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 98 [2022-12-14 12:58:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:03,015 INFO L225 Difference]: With dead ends: 7984 [2022-12-14 12:58:03,016 INFO L226 Difference]: Without dead ends: 5343 [2022-12-14 12:58:03,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:58:03,032 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 1731 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:03,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1896 Valid, 1394 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:58:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2022-12-14 12:58:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5204. [2022-12-14 12:58:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5204 states, 3627 states have (on average 1.533498759305211) internal successors, (5562), 3768 states have internal predecessors, (5562), 1246 states have call successors, (1246), 250 states have call predecessors, (1246), 330 states have return successors, (1466), 1262 states have call predecessors, (1466), 1241 states have call successors, (1466) [2022-12-14 12:58:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5204 states to 5204 states and 8274 transitions. [2022-12-14 12:58:03,426 INFO L78 Accepts]: Start accepts. Automaton has 5204 states and 8274 transitions. Word has length 98 [2022-12-14 12:58:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:03,426 INFO L495 AbstractCegarLoop]: Abstraction has 5204 states and 8274 transitions. [2022-12-14 12:58:03,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 7 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2022-12-14 12:58:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 5204 states and 8274 transitions. [2022-12-14 12:58:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 12:58:03,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:03,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:58:03,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:03,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1410480379, now seen corresponding path program 1 times [2022-12-14 12:58:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:03,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677778722] [2022-12-14 12:58:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:03,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677778722] [2022-12-14 12:58:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677778722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:03,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 12:58:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608775666] [2022-12-14 12:58:03,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:03,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:58:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:58:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:03,800 INFO L87 Difference]: Start difference. First operand 5204 states and 8274 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2022-12-14 12:58:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:06,981 INFO L93 Difference]: Finished difference Result 10927 states and 17674 transitions. [2022-12-14 12:58:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 12:58:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) Word has length 101 [2022-12-14 12:58:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:07,003 INFO L225 Difference]: With dead ends: 10927 [2022-12-14 12:58:07,003 INFO L226 Difference]: Without dead ends: 6194 [2022-12-14 12:58:07,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 12:58:07,020 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 2249 mSDsluCounter, 4038 mSDsCounter, 0 mSdLazyCounter, 7413 mSolverCounterSat, 1270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 4576 SdHoareTripleChecker+Invalid, 8683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1270 IncrementalHoareTripleChecker+Valid, 7413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:07,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2267 Valid, 4576 Invalid, 8683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1270 Valid, 7413 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 12:58:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2022-12-14 12:58:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 6000. [2022-12-14 12:58:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 4352 states have (on average 1.5415900735294117) internal successors, (6709), 4513 states have internal predecessors, (6709), 1269 states have call successors, (1269), 278 states have call predecessors, (1269), 378 states have return successors, (1489), 1285 states have call predecessors, (1489), 1264 states have call successors, (1489) [2022-12-14 12:58:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 9467 transitions. [2022-12-14 12:58:07,280 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 9467 transitions. Word has length 101 [2022-12-14 12:58:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:07,280 INFO L495 AbstractCegarLoop]: Abstraction has 6000 states and 9467 transitions. [2022-12-14 12:58:07,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 8 states have call successors, (18), 3 states have call predecessors, (18), 6 states have return successors, (17), 7 states have call predecessors, (17), 8 states have call successors, (17) [2022-12-14 12:58:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 9467 transitions. [2022-12-14 12:58:07,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 12:58:07,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:07,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:07,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:58:07,283 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1302931655, now seen corresponding path program 1 times [2022-12-14 12:58:07,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:07,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331650604] [2022-12-14 12:58:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:07,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:07,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331650604] [2022-12-14 12:58:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331650604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:07,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:58:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80760559] [2022-12-14 12:58:07,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:07,517 INFO L87 Difference]: Start difference. First operand 6000 states and 9467 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 12:58:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:10,182 INFO L93 Difference]: Finished difference Result 19473 states and 31485 transitions. [2022-12-14 12:58:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:58:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 101 [2022-12-14 12:58:10,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:10,223 INFO L225 Difference]: With dead ends: 19473 [2022-12-14 12:58:10,223 INFO L226 Difference]: Without dead ends: 13498 [2022-12-14 12:58:10,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:58:10,241 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 2224 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:10,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2337 Valid, 1783 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 12:58:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2022-12-14 12:58:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 12607. [2022-12-14 12:58:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12607 states, 8978 states have (on average 1.530630429939853) internal successors, (13742), 9421 states have internal predecessors, (13742), 2857 states have call successors, (2857), 566 states have call predecessors, (2857), 771 states have return successors, (3519), 2850 states have call predecessors, (3519), 2852 states have call successors, (3519) [2022-12-14 12:58:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12607 states to 12607 states and 20118 transitions. [2022-12-14 12:58:10,951 INFO L78 Accepts]: Start accepts. Automaton has 12607 states and 20118 transitions. Word has length 101 [2022-12-14 12:58:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:10,951 INFO L495 AbstractCegarLoop]: Abstraction has 12607 states and 20118 transitions. [2022-12-14 12:58:10,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 12:58:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 12607 states and 20118 transitions. [2022-12-14 12:58:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:58:10,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:10,953 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:58:10,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -959812792, now seen corresponding path program 1 times [2022-12-14 12:58:10,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:10,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758761973] [2022-12-14 12:58:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:58:11,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:11,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758761973] [2022-12-14 12:58:11,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758761973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:11,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:11,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 12:58:11,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514501104] [2022-12-14 12:58:11,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:11,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:58:11,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:58:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:58:11,156 INFO L87 Difference]: Start difference. First operand 12607 states and 20118 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 12:58:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:13,099 INFO L93 Difference]: Finished difference Result 24720 states and 39648 transitions. [2022-12-14 12:58:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:58:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2022-12-14 12:58:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:13,143 INFO L225 Difference]: With dead ends: 24720 [2022-12-14 12:58:13,144 INFO L226 Difference]: Without dead ends: 13747 [2022-12-14 12:58:13,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:58:13,171 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1006 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:13,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 1677 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:58:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13747 states. [2022-12-14 12:58:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13747 to 12793. [2022-12-14 12:58:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12793 states, 9102 states have (on average 1.5264776972094045) internal successors, (13894), 9573 states have internal predecessors, (13894), 2861 states have call successors, (2861), 598 states have call predecessors, (2861), 829 states have return successors, (3597), 2852 states have call predecessors, (3597), 2856 states have call successors, (3597) [2022-12-14 12:58:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12793 states to 12793 states and 20352 transitions. [2022-12-14 12:58:14,015 INFO L78 Accepts]: Start accepts. Automaton has 12793 states and 20352 transitions. Word has length 102 [2022-12-14 12:58:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:14,015 INFO L495 AbstractCegarLoop]: Abstraction has 12793 states and 20352 transitions. [2022-12-14 12:58:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 12:58:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 12793 states and 20352 transitions. [2022-12-14 12:58:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 12:58:14,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:14,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:14,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:58:14,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1427519302, now seen corresponding path program 1 times [2022-12-14 12:58:14,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:14,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766943273] [2022-12-14 12:58:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:14,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:14,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:14,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766943273] [2022-12-14 12:58:14,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766943273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:14,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:14,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:58:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580912174] [2022-12-14 12:58:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:58:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:58:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:58:14,215 INFO L87 Difference]: Start difference. First operand 12793 states and 20352 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:58:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:15,136 INFO L93 Difference]: Finished difference Result 12919 states and 20561 transitions. [2022-12-14 12:58:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:58:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2022-12-14 12:58:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:15,176 INFO L225 Difference]: With dead ends: 12919 [2022-12-14 12:58:15,177 INFO L226 Difference]: Without dead ends: 12904 [2022-12-14 12:58:15,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:58:15,185 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 668 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:15,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1872 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:58:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2022-12-14 12:58:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 12801. [2022-12-14 12:58:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12801 states, 9110 states have (on average 1.5260153677277717) internal successors, (13902), 9581 states have internal predecessors, (13902), 2861 states have call successors, (2861), 598 states have call predecessors, (2861), 829 states have return successors, (3597), 2852 states have call predecessors, (3597), 2856 states have call successors, (3597) [2022-12-14 12:58:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12801 states to 12801 states and 20360 transitions. [2022-12-14 12:58:15,841 INFO L78 Accepts]: Start accepts. Automaton has 12801 states and 20360 transitions. Word has length 106 [2022-12-14 12:58:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:15,842 INFO L495 AbstractCegarLoop]: Abstraction has 12801 states and 20360 transitions. [2022-12-14 12:58:15,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:58:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12801 states and 20360 transitions. [2022-12-14 12:58:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 12:58:15,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:15,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:58:15,843 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 870400614, now seen corresponding path program 1 times [2022-12-14 12:58:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572580923] [2022-12-14 12:58:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:16,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:16,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572580923] [2022-12-14 12:58:16,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572580923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:16,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 12:58:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194834191] [2022-12-14 12:58:16,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:58:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:16,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:58:16,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:16,135 INFO L87 Difference]: Start difference. First operand 12801 states and 20360 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 12:58:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:19,751 INFO L93 Difference]: Finished difference Result 13921 states and 22105 transitions. [2022-12-14 12:58:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 12:58:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) Word has length 112 [2022-12-14 12:58:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:19,788 INFO L225 Difference]: With dead ends: 13921 [2022-12-14 12:58:19,788 INFO L226 Difference]: Without dead ends: 13904 [2022-12-14 12:58:19,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 12:58:19,796 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 2746 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 7888 mSolverCounterSat, 1553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2772 SdHoareTripleChecker+Valid, 3959 SdHoareTripleChecker+Invalid, 9441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1553 IncrementalHoareTripleChecker+Valid, 7888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:19,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2772 Valid, 3959 Invalid, 9441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1553 Valid, 7888 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 12:58:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13904 states. [2022-12-14 12:58:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13904 to 13373. [2022-12-14 12:58:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13373 states, 9564 states have (on average 1.5322040987034713) internal successors, (14654), 10031 states have internal predecessors, (14654), 2897 states have call successors, (2897), 681 states have call predecessors, (2897), 911 states have return successors, (3644), 2891 states have call predecessors, (3644), 2892 states have call successors, (3644) [2022-12-14 12:58:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13373 states to 13373 states and 21195 transitions. [2022-12-14 12:58:20,461 INFO L78 Accepts]: Start accepts. Automaton has 13373 states and 21195 transitions. Word has length 112 [2022-12-14 12:58:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:20,461 INFO L495 AbstractCegarLoop]: Abstraction has 13373 states and 21195 transitions. [2022-12-14 12:58:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 5 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (20), 6 states have call predecessors, (20), 4 states have call successors, (20) [2022-12-14 12:58:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13373 states and 21195 transitions. [2022-12-14 12:58:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 12:58:20,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:20,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:20,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 12:58:20,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:20,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2069997938, now seen corresponding path program 1 times [2022-12-14 12:58:20,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:20,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949993656] [2022-12-14 12:58:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:58:20,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949993656] [2022-12-14 12:58:20,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949993656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:58:20,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:58:20,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 12:58:20,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699080508] [2022-12-14 12:58:20,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:58:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:58:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:58:20,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:58:20,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:58:20,878 INFO L87 Difference]: Start difference. First operand 13373 states and 21195 transitions. Second operand has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 12:58:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:58:24,843 INFO L93 Difference]: Finished difference Result 37776 states and 60569 transitions. [2022-12-14 12:58:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:58:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 118 [2022-12-14 12:58:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:58:24,912 INFO L225 Difference]: With dead ends: 37776 [2022-12-14 12:58:24,912 INFO L226 Difference]: Without dead ends: 24430 [2022-12-14 12:58:24,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:58:24,945 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 2252 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 3287 mSolverCounterSat, 906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2322 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 4193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 906 IncrementalHoareTripleChecker+Valid, 3287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:58:24,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2322 Valid, 2019 Invalid, 4193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [906 Valid, 3287 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:58:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24430 states. [2022-12-14 12:58:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24430 to 21759. [2022-12-14 12:58:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21759 states, 15435 states have (on average 1.5398769031422093) internal successors, (23768), 16337 states have internal predecessors, (23768), 4867 states have call successors, (4867), 1069 states have call predecessors, (4867), 1456 states have return successors, (6139), 4695 states have call predecessors, (6139), 4862 states have call successors, (6139) [2022-12-14 12:58:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21759 states to 21759 states and 34774 transitions. [2022-12-14 12:58:26,236 INFO L78 Accepts]: Start accepts. Automaton has 21759 states and 34774 transitions. Word has length 118 [2022-12-14 12:58:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:58:26,237 INFO L495 AbstractCegarLoop]: Abstraction has 21759 states and 34774 transitions. [2022-12-14 12:58:26,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 7 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-12-14 12:58:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21759 states and 34774 transitions. [2022-12-14 12:58:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 12:58:26,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:58:26,239 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:58:26,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 12:58:26,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:58:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:58:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash 427140141, now seen corresponding path program 1 times [2022-12-14 12:58:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:58:26,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470551783] [2022-12-14 12:58:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:58:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:58:27,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470551783] [2022-12-14 12:58:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470551783] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729446661] [2022-12-14 12:58:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:27,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:58:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:58:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:58:29,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:58:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729446661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:31,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755480914] [2022-12-14 12:58:31,913 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-12-14 12:58:31,913 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:58:31,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:58:31,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:58:31,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:58:37,400 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs [2022-12-14 12:59:42,659 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 592 for LOIs [2022-12-14 13:00:19,007 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 443 for LOIs [2022-12-14 13:00:19,080 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 577 for LOIs [2022-12-14 13:00:23,997 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 107 for LOIs [2022-12-14 13:00:24,056 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 76 for LOIs [2022-12-14 13:00:24,071 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 68 for LOIs [2022-12-14 13:00:24,086 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 468 for LOIs [2022-12-14 13:00:24,362 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 597 for LOIs [2022-12-14 13:00:27,972 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 476 for LOIs [2022-12-14 13:00:28,264 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 106 for LOIs [2022-12-14 13:00:28,572 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-12-14 13:00:28,583 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 560 for LOIs [2022-12-14 13:00:31,239 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 837 for LOIs [2022-12-14 13:04:17,291 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 664 for LOIs [2022-12-14 13:04:17,797 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:04:30,289 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 664 DAG size of output: 525 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:37,411 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 704 DAG size of output: 539 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:04:42,752 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 679 DAG size of output: 617 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:03,515 WARN L233 SmtUtils]: Spent 14.87s on a formula simplification. DAG size of input: 837 DAG size of output: 688 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:05:29,348 WARN L233 SmtUtils]: Spent 19.71s on a formula simplification. DAG size of input: 1178 DAG size of output: 686 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:28,864 WARN L233 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 561 DAG size of output: 500 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:35,363 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 468 DAG size of output: 448 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:41,089 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 472 DAG size of output: 452 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:48,797 WARN L233 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 563 DAG size of output: 511 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:06:55,901 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 568 DAG size of output: 512 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:03,592 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 570 DAG size of output: 514 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:11,250 WARN L233 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 572 DAG size of output: 516 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:07:18,814 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 574 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:08:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1755480914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:17,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:17,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [22, 12, 12] total 106 [2022-12-14 13:08:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092761327] [2022-12-14 13:08:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:17,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-14 13:08:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-14 13:08:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=10387, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 13:08:17,996 INFO L87 Difference]: Start difference. First operand 21759 states and 34774 transitions. Second operand has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 44 states have internal predecessors, (73), 18 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (21), 18 states have call predecessors, (21), 18 states have call successors, (21) [2022-12-14 13:08:24,618 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 646 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:08:40,827 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 609 DAG size of output: 563 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:08:55,879 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 674 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:10:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:10:50,191 INFO L93 Difference]: Finished difference Result 43613 states and 69722 transitions. [2022-12-14 13:10:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 13:10:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 44 states have internal predecessors, (73), 18 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (21), 18 states have call predecessors, (21), 18 states have call successors, (21) Word has length 121 [2022-12-14 13:10:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:10:50,253 INFO L225 Difference]: With dead ends: 43613 [2022-12-14 13:10:50,253 INFO L226 Difference]: Without dead ends: 21878 [2022-12-14 13:10:50,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 279 SyntacticMatches, 6 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5740 ImplicationChecksByTransitivity, 323.3s TimeCoverageRelationStatistics Valid=1107, Invalid=14393, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 13:10:50,309 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 257 mSDsluCounter, 8820 mSDsCounter, 0 mSdLazyCounter, 18066 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 9297 SdHoareTripleChecker+Invalid, 18138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 18066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:10:50,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 9297 Invalid, 18138 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 18066 Invalid, 0 Unknown, 0 Unchecked, 68.0s Time] [2022-12-14 13:10:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21878 states. [2022-12-14 13:10:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21878 to 21797. [2022-12-14 13:10:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21797 states, 15462 states have (on average 1.5389988358556461) internal successors, (23796), 16365 states have internal predecessors, (23796), 4872 states have call successors, (4872), 1075 states have call predecessors, (4872), 1462 states have return successors, (6147), 4699 states have call predecessors, (6147), 4867 states have call successors, (6147) [2022-12-14 13:10:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21797 states to 21797 states and 34815 transitions. [2022-12-14 13:10:51,665 INFO L78 Accepts]: Start accepts. Automaton has 21797 states and 34815 transitions. Word has length 121 [2022-12-14 13:10:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:10:51,666 INFO L495 AbstractCegarLoop]: Abstraction has 21797 states and 34815 transitions. [2022-12-14 13:10:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 44 states have internal predecessors, (73), 18 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (21), 18 states have call predecessors, (21), 18 states have call successors, (21) [2022-12-14 13:10:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21797 states and 34815 transitions. [2022-12-14 13:10:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 13:10:51,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:10:51,667 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:10:51,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:10:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 13:10:51,869 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:10:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:10:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1454647674, now seen corresponding path program 1 times [2022-12-14 13:10:51,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:10:51,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513421880] [2022-12-14 13:10:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:51,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:10:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:10:53,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:10:53,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513421880] [2022-12-14 13:10:53,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513421880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:10:53,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107419898] [2022-12-14 13:10:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:53,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:10:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:10:53,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:10:53,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1f2149-3426-44eb-a496-8d5b4a75fada/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:10:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:10:53,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 13:10:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:10:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:10:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 13:10:56,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107419898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:10:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559937557] [2022-12-14 13:10:56,761 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-12-14 13:10:56,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:10:56,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:10:56,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:10:56,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:11:01,372 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs