./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/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_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/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_f51280fc-a837-473e-95a1-55812851c13a/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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- 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 12:54:17,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:54:17,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:54:17,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:54:17,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:54:17,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:54:17,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:54:17,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:54:17,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:54:17,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:54:17,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:54:17,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:54:17,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:54:17,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:54:17,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:54:17,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:54:17,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:54:17,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:54:17,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:54:17,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:54:17,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:54:17,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:54:17,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:54:17,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:54:17,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:54:17,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:54:17,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:54:17,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:54:17,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:54:17,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:54:17,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:54:17,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:54:17,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:54:17,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:54:17,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:54:17,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:54:17,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:54:17,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:54:17,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:54:17,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:54:17,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:54:17,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:54:17,118 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:54:17,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:54:17,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:54:17,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:54:17,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:54:17,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:54:17,123 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:54:17,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:54:17,123 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:54:17,124 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:54:17,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:54:17,125 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:54:17,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:54:17,125 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:54:17,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:54:17,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:54:17,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:54:17,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:54:17,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:54:17,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:54:17,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:54:17,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:54:17,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:54:17,128 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_f51280fc-a837-473e-95a1-55812851c13a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2022-12-14 12:54:17,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:54:17,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:54:17,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:54:17,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:54:17,318 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:54:17,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-12-14 12:54:19,986 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:54:20,177 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:54:20,177 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2022-12-14 12:54:20,190 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/data/402f273ae/4288ca0487e64ede9b9189f8c12a2f42/FLAG621cb8a5b [2022-12-14 12:54:20,200 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/data/402f273ae/4288ca0487e64ede9b9189f8c12a2f42 [2022-12-14 12:54:20,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:54:20,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:54:20,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:54:20,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:54:20,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:54:20,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95a8c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20, skipping insertion in model container [2022-12-14 12:54:20,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:54:20,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:54:20,543 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_f51280fc-a837-473e-95a1-55812851c13a/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-12-14 12:54:20,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:54:20,560 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:54:20,628 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_f51280fc-a837-473e-95a1-55812851c13a/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2022-12-14 12:54:20,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:54:20,649 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:54:20,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20 WrapperNode [2022-12-14 12:54:20,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:54:20,650 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:54:20,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:54:20,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:54:20,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,718 INFO L138 Inliner]: procedures = 91, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 863 [2022-12-14 12:54:20,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:54:20,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:54:20,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:54:20,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:54:20,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:54:20,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:54:20,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:54:20,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:54:20,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (1/1) ... [2022-12-14 12:54:20,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:54:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:20,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:54:20,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:54:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:54:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 12:54:20,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 12:54:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 12:54:20,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 12:54:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 12:54:20,820 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 12:54:20,821 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 12:54:20,821 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 12:54:20,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 12:54:20,821 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 12:54:20,821 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 12:54:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 12:54:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 12:54:20,822 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 12:54:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 12:54:20,822 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 12:54:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 12:54:20,822 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 12:54:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 12:54:20,822 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 12:54:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 12:54:20,823 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 12:54:20,823 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 12:54:20,823 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 12:54:20,823 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 12:54:20,823 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 12:54:20,823 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 12:54:20,824 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2022-12-14 12:54:20,824 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2022-12-14 12:54:20,824 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 12:54:20,824 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 12:54:20,824 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 12:54:20,824 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 12:54:20,824 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 12:54:20,825 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 12:54:20,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:54:20,825 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 12:54:20,825 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 12:54:20,825 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 12:54:20,825 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 12:54:20,826 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 12:54:20,826 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 12:54:20,826 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 12:54:20,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 12:54:20,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:54:20,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:54:20,826 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 12:54:20,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 12:54:20,948 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:54:20,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:54:21,698 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:54:22,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:54:22,129 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:54:22,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:54:22 BoogieIcfgContainer [2022-12-14 12:54:22,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:54:22,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:54:22,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:54:22,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:54:22,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:54:20" (1/3) ... [2022-12-14 12:54:22,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8a668d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:54:22, skipping insertion in model container [2022-12-14 12:54:22,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:20" (2/3) ... [2022-12-14 12:54:22,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8a668d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:54:22, skipping insertion in model container [2022-12-14 12:54:22,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:54:22" (3/3) ... [2022-12-14 12:54:22,138 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2022-12-14 12:54:22,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:54:22,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:54:22,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:54:22,199 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;@7e1216a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:54:22,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:54:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-12-14 12:54:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:54:22,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:22,212 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:22,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash 902276917, now seen corresponding path program 1 times [2022-12-14 12:54:22,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:22,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994631190] [2022-12-14 12:54:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:54:22,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994631190] [2022-12-14 12:54:22,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994631190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:22,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899696453] [2022-12-14 12:54:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:22,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:22,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:54:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:54:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:54:23,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:23,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899696453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:23,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:23,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:54:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895149604] [2022-12-14 12:54:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:54:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:54:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:54:23,107 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:54:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:23,366 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2022-12-14 12:54:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:54:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-12-14 12:54:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:23,387 INFO L225 Difference]: With dead ends: 1095 [2022-12-14 12:54:23,387 INFO L226 Difference]: Without dead ends: 707 [2022-12-14 12:54:23,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 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 12:54:23,397 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 587 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:23,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-12-14 12:54:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2022-12-14 12:54:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2022-12-14 12:54:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2022-12-14 12:54:23,505 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2022-12-14 12:54:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:23,505 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2022-12-14 12:54:23,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:54:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2022-12-14 12:54:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:54:23,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:23,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:54:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:54:23,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash -310897236, now seen corresponding path program 1 times [2022-12-14 12:54:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433813639] [2022-12-14 12:54:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:24,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:24,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433813639] [2022-12-14 12:54:24,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433813639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:24,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:54:24,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:54:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070086296] [2022-12-14 12:54:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:54:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:54:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:54:24,021 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 12:54:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:24,295 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2022-12-14 12:54:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:54:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-12-14 12:54:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:24,306 INFO L225 Difference]: With dead ends: 2057 [2022-12-14 12:54:24,306 INFO L226 Difference]: Without dead ends: 1374 [2022-12-14 12:54:24,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:54:24,312 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 576 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:24,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1265 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:54:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-12-14 12:54:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2022-12-14 12:54:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2022-12-14 12:54:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2022-12-14 12:54:24,399 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2022-12-14 12:54:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:24,399 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2022-12-14 12:54:24,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 12:54:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2022-12-14 12:54:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 12:54:24,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:24,405 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:54:24,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:24,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash -545264573, now seen corresponding path program 1 times [2022-12-14 12:54:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:24,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162153206] [2022-12-14 12:54:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:24,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162153206] [2022-12-14 12:54:24,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162153206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:24,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:54:24,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:54:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917359280] [2022-12-14 12:54:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:54:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:54:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:54:24,734 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 12:54:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:24,988 INFO L93 Difference]: Finished difference Result 2993 states and 4835 transitions. [2022-12-14 12:54:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:54:24,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-12-14 12:54:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:24,996 INFO L225 Difference]: With dead ends: 2993 [2022-12-14 12:54:24,996 INFO L226 Difference]: Without dead ends: 1715 [2022-12-14 12:54:25,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:54:25,002 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 435 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:25,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 1602 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-12-14 12:54:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1673. [2022-12-14 12:54:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1167 states have (on average 1.5569837189374465) internal successors, (1817), 1221 states have internal predecessors, (1817), 394 states have call successors, (394), 104 states have call predecessors, (394), 111 states have return successors, (472), 375 states have call predecessors, (472), 388 states have call successors, (472) [2022-12-14 12:54:25,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2683 transitions. [2022-12-14 12:54:25,070 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2683 transitions. Word has length 69 [2022-12-14 12:54:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:25,070 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2683 transitions. [2022-12-14 12:54:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 12:54:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2683 transitions. [2022-12-14 12:54:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:54:25,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:25,073 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:25,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:54:25,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1577198869, now seen corresponding path program 1 times [2022-12-14 12:54:25,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:25,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845408419] [2022-12-14 12:54:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:25,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845408419] [2022-12-14 12:54:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845408419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:25,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:54:25,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:54:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485933230] [2022-12-14 12:54:25,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:25,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:54:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:54:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:54:25,300 INFO L87 Difference]: Start difference. First operand 1673 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 12:54:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:26,044 INFO L93 Difference]: Finished difference Result 4466 states and 7499 transitions. [2022-12-14 12:54:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:54:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2022-12-14 12:54:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:26,058 INFO L225 Difference]: With dead ends: 4466 [2022-12-14 12:54:26,058 INFO L226 Difference]: Without dead ends: 2805 [2022-12-14 12:54:26,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:54:26,068 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 644 mSDsluCounter, 2532 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:26,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 3260 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:54:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-12-14 12:54:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2429. [2022-12-14 12:54:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 1700 states have (on average 1.5488235294117647) internal successors, (2633), 1786 states have internal predecessors, (2633), 564 states have call successors, (564), 153 states have call predecessors, (564), 164 states have return successors, (735), 533 states have call predecessors, (735), 556 states have call successors, (735) [2022-12-14 12:54:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 3932 transitions. [2022-12-14 12:54:26,247 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 3932 transitions. Word has length 70 [2022-12-14 12:54:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:26,247 INFO L495 AbstractCegarLoop]: Abstraction has 2429 states and 3932 transitions. [2022-12-14 12:54:26,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 12:54:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 3932 transitions. [2022-12-14 12:54:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:54:26,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:26,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:54:26,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2029772041, now seen corresponding path program 1 times [2022-12-14 12:54:26,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:26,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421410038] [2022-12-14 12:54:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:54:26,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:26,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421410038] [2022-12-14 12:54:26,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421410038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:26,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119615166] [2022-12-14 12:54:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:26,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:26,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:26,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:54:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:26,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:54:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:54:26,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:26,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119615166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:26,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:26,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:54:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028420444] [2022-12-14 12:54:26,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:26,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:54:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:54:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:54:26,736 INFO L87 Difference]: Start difference. First operand 2429 states and 3932 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:54:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:26,993 INFO L93 Difference]: Finished difference Result 5961 states and 9966 transitions. [2022-12-14 12:54:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:54:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2022-12-14 12:54:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:27,010 INFO L225 Difference]: With dead ends: 5961 [2022-12-14 12:54:27,010 INFO L226 Difference]: Without dead ends: 3544 [2022-12-14 12:54:27,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 12:54:27,027 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 553 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:27,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1138 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-12-14 12:54:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3399. [2022-12-14 12:54:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2393 states have (on average 1.5436690346844963) internal successors, (3694), 2523 states have internal predecessors, (3694), 772 states have call successors, (772), 210 states have call predecessors, (772), 233 states have return successors, (1044), 731 states have call predecessors, (1044), 764 states have call successors, (1044) [2022-12-14 12:54:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5510 transitions. [2022-12-14 12:54:27,178 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5510 transitions. Word has length 70 [2022-12-14 12:54:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:27,178 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5510 transitions. [2022-12-14 12:54:27,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:54:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5510 transitions. [2022-12-14 12:54:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:54:27,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:27,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:27,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:54:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:27,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 528676486, now seen corresponding path program 1 times [2022-12-14 12:54:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219279213] [2022-12-14 12:54:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:54:27,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219279213] [2022-12-14 12:54:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219279213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600568233] [2022-12-14 12:54:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:27,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:27,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:54:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:27,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:54:27,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:27,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600568233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:27,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:27,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 12:54:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904452972] [2022-12-14 12:54:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:54:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:54:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:54:27,921 INFO L87 Difference]: Start difference. First operand 3399 states and 5510 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:54:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:28,469 INFO L93 Difference]: Finished difference Result 8797 states and 14640 transitions. [2022-12-14 12:54:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:54:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-12-14 12:54:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:28,494 INFO L225 Difference]: With dead ends: 8797 [2022-12-14 12:54:28,494 INFO L226 Difference]: Without dead ends: 5410 [2022-12-14 12:54:28,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:54:28,513 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 498 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:28,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1816 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:54:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2022-12-14 12:54:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 5226. [2022-12-14 12:54:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3685 states have (on average 1.5042062415196744) internal successors, (5543), 3905 states have internal predecessors, (5543), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-12-14 12:54:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 8298 transitions. [2022-12-14 12:54:28,735 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 8298 transitions. Word has length 71 [2022-12-14 12:54:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:28,735 INFO L495 AbstractCegarLoop]: Abstraction has 5226 states and 8298 transitions. [2022-12-14 12:54:28,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:54:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 8298 transitions. [2022-12-14 12:54:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:54:28,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:28,737 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] [2022-12-14 12:54:28,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:54:28,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:54:28,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2045017244, now seen corresponding path program 1 times [2022-12-14 12:54:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:28,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990546103] [2022-12-14 12:54:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:29,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:29,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990546103] [2022-12-14 12:54:29,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990546103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619318899] [2022-12-14 12:54:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:29,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:29,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:54:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:29,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:54:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:29,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:29,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619318899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:29,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:29,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 12:54:29,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330347032] [2022-12-14 12:54:29,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:54:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:54:29,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:54:29,577 INFO L87 Difference]: Start difference. First operand 5226 states and 8298 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 12:54:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:30,082 INFO L93 Difference]: Finished difference Result 10338 states and 16814 transitions. [2022-12-14 12:54:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:54:30,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2022-12-14 12:54:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:30,109 INFO L225 Difference]: With dead ends: 10338 [2022-12-14 12:54:30,109 INFO L226 Difference]: Without dead ends: 6291 [2022-12-14 12:54:30,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:30,124 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 117 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:30,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1752 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:54:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-12-14 12:54:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 5256. [2022-12-14 12:54:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3715 states have (on average 1.5001345895020188) internal successors, (5573), 3935 states have internal predecessors, (5573), 1184 states have call successors, (1184), 336 states have call predecessors, (1184), 356 states have return successors, (1571), 1090 states have call predecessors, (1571), 1173 states have call successors, (1571) [2022-12-14 12:54:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8328 transitions. [2022-12-14 12:54:30,359 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8328 transitions. Word has length 80 [2022-12-14 12:54:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:30,359 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 8328 transitions. [2022-12-14 12:54:30,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 12:54:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8328 transitions. [2022-12-14 12:54:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 12:54:30,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:30,361 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:30,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:54:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:30,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1881015703, now seen corresponding path program 1 times [2022-12-14 12:54:30,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:30,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574207275] [2022-12-14 12:54:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 12:54:31,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574207275] [2022-12-14 12:54:31,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574207275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:31,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814607616] [2022-12-14 12:54:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:31,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:31,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:31,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:54:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:31,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:54:31,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:31,596 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 12:54:31,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814607616] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:31,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:31,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2022-12-14 12:54:31,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171252708] [2022-12-14 12:54:31,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:31,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:54:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:54:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:54:31,598 INFO L87 Difference]: Start difference. First operand 5256 states and 8328 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 12:54:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:33,226 INFO L93 Difference]: Finished difference Result 10919 states and 17521 transitions. [2022-12-14 12:54:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:54:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2022-12-14 12:54:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:33,255 INFO L225 Difference]: With dead ends: 10919 [2022-12-14 12:54:33,255 INFO L226 Difference]: Without dead ends: 6860 [2022-12-14 12:54:33,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:54:33,271 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 1351 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:33,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 1927 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:54:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6860 states. [2022-12-14 12:54:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6860 to 5891. [2022-12-14 12:54:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 4170 states have (on average 1.484412470023981) internal successors, (6190), 4433 states have internal predecessors, (6190), 1312 states have call successors, (1312), 360 states have call predecessors, (1312), 408 states have return successors, (1825), 1200 states have call predecessors, (1825), 1301 states have call successors, (1825) [2022-12-14 12:54:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 9327 transitions. [2022-12-14 12:54:33,577 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 9327 transitions. Word has length 84 [2022-12-14 12:54:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:33,577 INFO L495 AbstractCegarLoop]: Abstraction has 5891 states and 9327 transitions. [2022-12-14 12:54:33,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-12-14 12:54:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 9327 transitions. [2022-12-14 12:54:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 12:54:33,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:33,580 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:33,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:54:33,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:33,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2079758946, now seen corresponding path program 1 times [2022-12-14 12:54:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:33,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797030841] [2022-12-14 12:54:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:54:34,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797030841] [2022-12-14 12:54:34,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797030841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139066229] [2022-12-14 12:54:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:34,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:34,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:54:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 12:54:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:54:34,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:54:34,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139066229] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:34,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:34,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-12-14 12:54:34,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812812793] [2022-12-14 12:54:34,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:34,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:54:34,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:34,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:54:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:54:34,880 INFO L87 Difference]: Start difference. First operand 5891 states and 9327 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 12:54:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:38,005 INFO L93 Difference]: Finished difference Result 17211 states and 30127 transitions. [2022-12-14 12:54:38,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:54:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-12-14 12:54:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:38,063 INFO L225 Difference]: With dead ends: 17211 [2022-12-14 12:54:38,063 INFO L226 Difference]: Without dead ends: 12955 [2022-12-14 12:54:38,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:54:38,087 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 2647 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1273 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:38,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2736 Valid, 3001 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1273 Valid, 2979 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 12:54:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2022-12-14 12:54:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 11319. [2022-12-14 12:54:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4153), 2201 states have call predecessors, (4153), 2349 states have call successors, (4153) [2022-12-14 12:54:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18667 transitions. [2022-12-14 12:54:38,791 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18667 transitions. Word has length 87 [2022-12-14 12:54:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:38,792 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18667 transitions. [2022-12-14 12:54:38,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 5 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 12:54:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18667 transitions. [2022-12-14 12:54:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 12:54:38,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:38,794 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:38,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:54:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:38,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash 330847150, now seen corresponding path program 1 times [2022-12-14 12:54:38,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:38,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320398968] [2022-12-14 12:54:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:38,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:54:39,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320398968] [2022-12-14 12:54:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320398968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470980603] [2022-12-14 12:54:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:39,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:39,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:39,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:54:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:54:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:54:39,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:39,869 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 12:54:39,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470980603] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:39,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:39,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-12-14 12:54:39,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531092393] [2022-12-14 12:54:39,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:39,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:54:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:54:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:54:39,871 INFO L87 Difference]: Start difference. First operand 11319 states and 18667 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:54:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:41,355 INFO L93 Difference]: Finished difference Result 22566 states and 37839 transitions. [2022-12-14 12:54:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:54:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-12-14 12:54:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:41,405 INFO L225 Difference]: With dead ends: 22566 [2022-12-14 12:54:41,405 INFO L226 Difference]: Without dead ends: 12882 [2022-12-14 12:54:41,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:54:41,436 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1197 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:41,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 1638 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 12:54:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12882 states. [2022-12-14 12:54:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12882 to 11319. [2022-12-14 12:54:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11319 states, 8141 states have (on average 1.4921999754329935) internal successors, (12148), 8596 states have internal predecessors, (12148), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 811 states have return successors, (4141), 2201 states have call predecessors, (4141), 2349 states have call successors, (4141) [2022-12-14 12:54:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11319 states to 11319 states and 18655 transitions. [2022-12-14 12:54:42,151 INFO L78 Accepts]: Start accepts. Automaton has 11319 states and 18655 transitions. Word has length 91 [2022-12-14 12:54:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:42,151 INFO L495 AbstractCegarLoop]: Abstraction has 11319 states and 18655 transitions. [2022-12-14 12:54:42,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 12:54:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11319 states and 18655 transitions. [2022-12-14 12:54:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 12:54:42,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:42,155 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:42,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:54:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:54:42,355 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash -106741932, now seen corresponding path program 1 times [2022-12-14 12:54:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:42,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213131625] [2022-12-14 12:54:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:54:42,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213131625] [2022-12-14 12:54:42,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213131625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:42,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860461636] [2022-12-14 12:54:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:42,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:42,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:42,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:42,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:54:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:42,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:54:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:54:42,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860461636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:42,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:42,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 12:54:42,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767698359] [2022-12-14 12:54:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:54:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:54:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:42,914 INFO L87 Difference]: Start difference. First operand 11319 states and 18655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 12:54:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:43,618 INFO L93 Difference]: Finished difference Result 21798 states and 37277 transitions. [2022-12-14 12:54:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:54:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 111 [2022-12-14 12:54:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:43,662 INFO L225 Difference]: With dead ends: 21798 [2022-12-14 12:54:43,662 INFO L226 Difference]: Without dead ends: 11694 [2022-12-14 12:54:43,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:43,701 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 2 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:43,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2262 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11694 states. [2022-12-14 12:54:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11694 to 11541. [2022-12-14 12:54:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11541 states, 8291 states have (on average 1.483295139307683) internal successors, (12298), 8779 states have internal predecessors, (12298), 2366 states have call successors, (2366), 681 states have call predecessors, (2366), 883 states have return successors, (4623), 2240 states have call predecessors, (4623), 2349 states have call successors, (4623) [2022-12-14 12:54:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11541 states to 11541 states and 19287 transitions. [2022-12-14 12:54:44,420 INFO L78 Accepts]: Start accepts. Automaton has 11541 states and 19287 transitions. Word has length 111 [2022-12-14 12:54:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:44,421 INFO L495 AbstractCegarLoop]: Abstraction has 11541 states and 19287 transitions. [2022-12-14 12:54:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 12:54:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11541 states and 19287 transitions. [2022-12-14 12:54:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 12:54:44,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:44,426 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:44,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:54:44,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:44,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -215043771, now seen corresponding path program 1 times [2022-12-14 12:54:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403401050] [2022-12-14 12:54:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:44,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:54:44,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403401050] [2022-12-14 12:54:44,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403401050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844455725] [2022-12-14 12:54:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:44,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:44,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:44,996 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:44,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:54:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:45,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:54:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:54:45,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:45,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844455725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:45,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:45,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 12:54:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107019118] [2022-12-14 12:54:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:54:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:54:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:54:45,255 INFO L87 Difference]: Start difference. First operand 11541 states and 19287 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:54:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:46,019 INFO L93 Difference]: Finished difference Result 23853 states and 41402 transitions. [2022-12-14 12:54:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:54:46,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2022-12-14 12:54:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:46,066 INFO L225 Difference]: With dead ends: 23853 [2022-12-14 12:54:46,067 INFO L226 Difference]: Without dead ends: 11188 [2022-12-14 12:54:46,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:46,115 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 241 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:46,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1585 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-12-14 12:54:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 11155. [2022-12-14 12:54:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.452562977816769) internal successors, (11590), 8457 states have internal predecessors, (11590), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 12:54:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18322 transitions. [2022-12-14 12:54:46,752 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18322 transitions. Word has length 122 [2022-12-14 12:54:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:46,752 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18322 transitions. [2022-12-14 12:54:46,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:54:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18322 transitions. [2022-12-14 12:54:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 12:54:46,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:46,760 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:46,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:54:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:54:46,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:46,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1006609461, now seen corresponding path program 1 times [2022-12-14 12:54:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:46,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445205885] [2022-12-14 12:54:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:54:47,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445205885] [2022-12-14 12:54:47,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445205885] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:47,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141082465] [2022-12-14 12:54:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:47,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:47,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:47,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:47,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:54:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:47,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:54:47,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:54:47,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141082465] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:47,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:47,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 12:54:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769123742] [2022-12-14 12:54:47,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:47,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:54:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:54:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:54:47,687 INFO L87 Difference]: Start difference. First operand 11155 states and 18322 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:54:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:48,530 INFO L93 Difference]: Finished difference Result 23289 states and 39619 transitions. [2022-12-14 12:54:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:54:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-12-14 12:54:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:48,572 INFO L225 Difference]: With dead ends: 23289 [2022-12-14 12:54:48,572 INFO L226 Difference]: Without dead ends: 11155 [2022-12-14 12:54:48,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:48,617 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 239 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:48,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1554 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-12-14 12:54:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11155. [2022-12-14 12:54:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 7979 states have (on average 1.4167188870785812) internal successors, (11304), 8457 states have internal predecessors, (11304), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 12:54:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 18036 transitions. [2022-12-14 12:54:49,193 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 18036 transitions. Word has length 126 [2022-12-14 12:54:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:49,193 INFO L495 AbstractCegarLoop]: Abstraction has 11155 states and 18036 transitions. [2022-12-14 12:54:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 12:54:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 18036 transitions. [2022-12-14 12:54:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 12:54:49,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:49,200 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:54:49,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:54:49,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:54:49,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1849847968, now seen corresponding path program 1 times [2022-12-14 12:54:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:49,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331908473] [2022-12-14 12:54:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:54:49,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331908473] [2022-12-14 12:54:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331908473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916566953] [2022-12-14 12:54:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:49,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:54:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:54:50,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:50,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916566953] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:50,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:50,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 12:54:50,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570580153] [2022-12-14 12:54:50,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:54:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:54:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:54:50,015 INFO L87 Difference]: Start difference. First operand 11155 states and 18036 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 12:54:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:52,332 INFO L93 Difference]: Finished difference Result 24266 states and 40023 transitions. [2022-12-14 12:54:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 12:54:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 130 [2022-12-14 12:54:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:52,388 INFO L225 Difference]: With dead ends: 24266 [2022-12-14 12:54:52,388 INFO L226 Difference]: Without dead ends: 13081 [2022-12-14 12:54:52,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:54:52,427 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1134 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 3345 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 3820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 3345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:52,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 1450 Invalid, 3820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 3345 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:54:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13081 states. [2022-12-14 12:54:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13081 to 11140. [2022-12-14 12:54:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11140 states, 7964 states have (on average 1.4171270718232045) internal successors, (11286), 8442 states have internal predecessors, (11286), 2308 states have call successors, (2308), 677 states have call predecessors, (2308), 867 states have return successors, (4424), 2180 states have call predecessors, (4424), 2291 states have call successors, (4424) [2022-12-14 12:54:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11140 states to 11140 states and 18018 transitions. [2022-12-14 12:54:53,318 INFO L78 Accepts]: Start accepts. Automaton has 11140 states and 18018 transitions. Word has length 130 [2022-12-14 12:54:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:53,318 INFO L495 AbstractCegarLoop]: Abstraction has 11140 states and 18018 transitions. [2022-12-14 12:54:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 5 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-12-14 12:54:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11140 states and 18018 transitions. [2022-12-14 12:54:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 12:54:53,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:53,325 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:54:53,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:54:53,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:53,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 833322416, now seen corresponding path program 1 times [2022-12-14 12:54:53,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:53,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008577523] [2022-12-14 12:54:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 12:54:53,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008577523] [2022-12-14 12:54:53,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008577523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141848250] [2022-12-14 12:54:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:53,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:53,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:53,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:54:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:54:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:54:54,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:54:54,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141848250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:54,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:54:54,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 12:54:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344580259] [2022-12-14 12:54:54,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:54:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:54:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:54,247 INFO L87 Difference]: Start difference. First operand 11140 states and 18018 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:54:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:55,159 INFO L93 Difference]: Finished difference Result 26182 states and 43889 transitions. [2022-12-14 12:54:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:54:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 137 [2022-12-14 12:54:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:55,222 INFO L225 Difference]: With dead ends: 26182 [2022-12-14 12:54:55,223 INFO L226 Difference]: Without dead ends: 15054 [2022-12-14 12:54:55,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:54:55,268 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 462 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:55,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1321 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:54:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2022-12-14 12:54:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14738. [2022-12-14 12:54:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 10553 states have (on average 1.4159954515303705) internal successors, (14943), 11212 states have internal predecessors, (14943), 3035 states have call successors, (3035), 873 states have call predecessors, (3035), 1149 states have return successors, (5986), 2872 states have call predecessors, (5986), 3018 states have call successors, (5986) [2022-12-14 12:54:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 23964 transitions. [2022-12-14 12:54:56,110 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 23964 transitions. Word has length 137 [2022-12-14 12:54:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:56,111 INFO L495 AbstractCegarLoop]: Abstraction has 14738 states and 23964 transitions. [2022-12-14 12:54:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:54:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 23964 transitions. [2022-12-14 12:54:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 12:54:56,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:56,117 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:54:56,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:54:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:54:56,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1352618545, now seen corresponding path program 1 times [2022-12-14 12:54:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:56,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752334908] [2022-12-14 12:54:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:54:56,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752334908] [2022-12-14 12:54:56,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752334908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377631015] [2022-12-14 12:54:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:54:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:54:56,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:54:56,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:54:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:56,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:54:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:54:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:54:57,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:54:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:54:57,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377631015] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:54:57,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:54:57,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 19 [2022-12-14 12:54:57,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752122008] [2022-12-14 12:54:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:57,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:54:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:54:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:54:57,183 INFO L87 Difference]: Start difference. First operand 14738 states and 23964 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 12:55:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:00,756 INFO L93 Difference]: Finished difference Result 38197 states and 67453 transitions. [2022-12-14 12:55:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:55:00,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 142 [2022-12-14 12:55:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:00,876 INFO L225 Difference]: With dead ends: 38197 [2022-12-14 12:55:00,876 INFO L226 Difference]: Without dead ends: 25677 [2022-12-14 12:55:00,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:55:00,970 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 1913 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1982 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:00,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1982 Valid, 1890 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 12:55:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2022-12-14 12:55:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 22811. [2022-12-14 12:55:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22811 states, 16183 states have (on average 1.4181548538589879) internal successors, (22950), 17233 states have internal predecessors, (22950), 4810 states have call successors, (4810), 1445 states have call predecessors, (4810), 1817 states have return successors, (9505), 4512 states have call predecessors, (9505), 4784 states have call successors, (9505) [2022-12-14 12:55:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22811 states to 22811 states and 37265 transitions. [2022-12-14 12:55:02,462 INFO L78 Accepts]: Start accepts. Automaton has 22811 states and 37265 transitions. Word has length 142 [2022-12-14 12:55:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:02,463 INFO L495 AbstractCegarLoop]: Abstraction has 22811 states and 37265 transitions. [2022-12-14 12:55:02,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 6 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-12-14 12:55:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22811 states and 37265 transitions. [2022-12-14 12:55:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 12:55:02,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:02,470 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 12:55:02,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:55:02,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:55:02,672 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash -620422922, now seen corresponding path program 1 times [2022-12-14 12:55:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747567654] [2022-12-14 12:55:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:55:03,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747567654] [2022-12-14 12:55:03,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747567654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:03,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723525246] [2022-12-14 12:55:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:03,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:03,075 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:03,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:55:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:55:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:55:03,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723525246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:03,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 12:55:03,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633406003] [2022-12-14 12:55:03,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:03,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:55:03,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:55:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:55:03,422 INFO L87 Difference]: Start difference. First operand 22811 states and 37265 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 12:55:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:05,095 INFO L93 Difference]: Finished difference Result 44525 states and 74855 transitions. [2022-12-14 12:55:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:55:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-12-14 12:55:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:05,183 INFO L225 Difference]: With dead ends: 44525 [2022-12-14 12:55:05,184 INFO L226 Difference]: Without dead ends: 23926 [2022-12-14 12:55:05,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:55:05,268 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 33 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:05,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1104 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:55:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23926 states. [2022-12-14 12:55:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23926 to 23250. [2022-12-14 12:55:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23250 states, 16537 states have (on average 1.4135574771724013) internal successors, (23376), 17606 states have internal predecessors, (23376), 4884 states have call successors, (4884), 1442 states have call predecessors, (4884), 1828 states have return successors, (9563), 4585 states have call predecessors, (9563), 4858 states have call successors, (9563) [2022-12-14 12:55:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 37823 transitions. [2022-12-14 12:55:06,752 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 37823 transitions. Word has length 141 [2022-12-14 12:55:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:06,752 INFO L495 AbstractCegarLoop]: Abstraction has 23250 states and 37823 transitions. [2022-12-14 12:55:06,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 12:55:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 37823 transitions. [2022-12-14 12:55:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:55:06,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:06,759 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:06,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:06,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:55:06,961 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:06,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1709272155, now seen corresponding path program 1 times [2022-12-14 12:55:06,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:06,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824173770] [2022-12-14 12:55:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:06,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 12:55:07,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824173770] [2022-12-14 12:55:07,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824173770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622480483] [2022-12-14 12:55:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:07,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:07,357 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:07,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:55:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 2364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:55:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:55:07,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622480483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:07,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:07,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-12-14 12:55:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548445907] [2022-12-14 12:55:07,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:07,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:55:07,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:55:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:55:07,678 INFO L87 Difference]: Start difference. First operand 23250 states and 37823 transitions. Second operand has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 12:55:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:11,144 INFO L93 Difference]: Finished difference Result 58803 states and 97446 transitions. [2022-12-14 12:55:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:55:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 143 [2022-12-14 12:55:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:11,311 INFO L225 Difference]: With dead ends: 58803 [2022-12-14 12:55:11,311 INFO L226 Difference]: Without dead ends: 37765 [2022-12-14 12:55:11,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:55:11,421 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 580 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 4062 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:11,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 4062 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:55:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37765 states. [2022-12-14 12:55:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37765 to 36013. [2022-12-14 12:55:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36013 states, 25636 states have (on average 1.4200343267280386) internal successors, (36404), 27341 states have internal predecessors, (36404), 7567 states have call successors, (7567), 2267 states have call predecessors, (7567), 2809 states have return successors, (15577), 7024 states have call predecessors, (15577), 7523 states have call successors, (15577) [2022-12-14 12:55:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36013 states to 36013 states and 59548 transitions. [2022-12-14 12:55:13,902 INFO L78 Accepts]: Start accepts. Automaton has 36013 states and 59548 transitions. Word has length 143 [2022-12-14 12:55:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:13,902 INFO L495 AbstractCegarLoop]: Abstraction has 36013 states and 59548 transitions. [2022-12-14 12:55:13,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (26), 3 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 12:55:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 36013 states and 59548 transitions. [2022-12-14 12:55:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:55:13,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:13,911 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:13,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:55:14,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:55:14,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:14,113 INFO L85 PathProgramCache]: Analyzing trace with hash 717593929, now seen corresponding path program 1 times [2022-12-14 12:55:14,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:14,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992163784] [2022-12-14 12:55:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 12:55:14,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992163784] [2022-12-14 12:55:14,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992163784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144874867] [2022-12-14 12:55:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:14,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:14,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:14,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:55:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 2377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:55:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 12:55:14,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 12:55:15,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144874867] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:15,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:55:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 7] total 20 [2022-12-14 12:55:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279193820] [2022-12-14 12:55:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:55:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:55:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:55:15,024 INFO L87 Difference]: Start difference. First operand 36013 states and 59548 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-12-14 12:55:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:20,776 INFO L93 Difference]: Finished difference Result 85422 states and 150581 transitions. [2022-12-14 12:55:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:55:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) Word has length 146 [2022-12-14 12:55:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:21,086 INFO L225 Difference]: With dead ends: 85422 [2022-12-14 12:55:21,086 INFO L226 Difference]: Without dead ends: 51683 [2022-12-14 12:55:21,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-12-14 12:55:21,292 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 1695 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 1660 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:55:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2022-12-14 12:55:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 43351. [2022-12-14 12:55:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43351 states, 30055 states have (on average 1.4144401929795376) internal successors, (42511), 32171 states have internal predecessors, (42511), 9824 states have call successors, (9824), 3054 states have call predecessors, (9824), 3471 states have return successors, (18612), 9091 states have call predecessors, (18612), 9754 states have call successors, (18612) [2022-12-14 12:55:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43351 states to 43351 states and 70947 transitions. [2022-12-14 12:55:24,825 INFO L78 Accepts]: Start accepts. Automaton has 43351 states and 70947 transitions. Word has length 146 [2022-12-14 12:55:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:24,825 INFO L495 AbstractCegarLoop]: Abstraction has 43351 states and 70947 transitions. [2022-12-14 12:55:24,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 6 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 6 states have call predecessors, (25), 6 states have call successors, (25) [2022-12-14 12:55:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43351 states and 70947 transitions. [2022-12-14 12:55:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:55:24,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:24,838 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:55:24,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:25,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:25,040 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1210904355, now seen corresponding path program 1 times [2022-12-14 12:55:25,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:25,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263327687] [2022-12-14 12:55:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:25,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:55:25,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263327687] [2022-12-14 12:55:25,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263327687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612900508] [2022-12-14 12:55:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:25,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:25,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:25,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:55:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:55:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 12:55:25,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:55:25,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612900508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:55:25,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:55:25,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-12-14 12:55:25,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256631365] [2022-12-14 12:55:25,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:55:25,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:55:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:55:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:55:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:55:25,779 INFO L87 Difference]: Start difference. First operand 43351 states and 70947 transitions. Second operand has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:55:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:32,362 INFO L93 Difference]: Finished difference Result 119211 states and 208397 transitions. [2022-12-14 12:55:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:55:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 146 [2022-12-14 12:55:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:32,762 INFO L225 Difference]: With dead ends: 119211 [2022-12-14 12:55:32,763 INFO L226 Difference]: Without dead ends: 75821 [2022-12-14 12:55:33,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:55:33,132 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 597 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 3160 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:33,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 3160 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:55:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75821 states. [2022-12-14 12:55:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75821 to 71104. [2022-12-14 12:55:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71104 states, 49461 states have (on average 1.4133964133357595) internal successors, (69908), 53243 states have internal predecessors, (69908), 15867 states have call successors, (15867), 5046 states have call predecessors, (15867), 5775 states have return successors, (32046), 14420 states have call predecessors, (32046), 15783 states have call successors, (32046) [2022-12-14 12:55:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71104 states to 71104 states and 117821 transitions. [2022-12-14 12:55:39,139 INFO L78 Accepts]: Start accepts. Automaton has 71104 states and 117821 transitions. Word has length 146 [2022-12-14 12:55:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:55:39,139 INFO L495 AbstractCegarLoop]: Abstraction has 71104 states and 117821 transitions. [2022-12-14 12:55:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 12:55:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 71104 states and 117821 transitions. [2022-12-14 12:55:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 12:55:39,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:55:39,149 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:55:39,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 12:55:39,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:39,350 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:55:39,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:55:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 184843178, now seen corresponding path program 1 times [2022-12-14 12:55:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:55:39,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725965661] [2022-12-14 12:55:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:39,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:55:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:55:40,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:55:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725965661] [2022-12-14 12:55:40,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725965661] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:55:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866054721] [2022-12-14 12:55:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:55:40,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:55:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:55:40,021 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:55:40,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:55:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:55:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 2381 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 12:55:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:55:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 12:55:40,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:55:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:55:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866054721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:55:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115671196] [2022-12-14 12:55:40,626 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2022-12-14 12:55:40,626 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:55:40,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:55:40,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:55:40,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:55:47,476 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 12:55:54,739 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 12:55:54,740 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 12:55:56,925 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 12:55:57,137 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 42 for LOIs [2022-12-14 12:55:57,141 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 12:56:00,671 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 12:56:01,252 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 12:56:01,403 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 50 for LOIs [2022-12-14 12:56:01,738 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 50 for LOIs [2022-12-14 12:56:01,835 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 60 for LOIs [2022-12-14 12:56:01,848 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 44 for LOIs [2022-12-14 12:56:01,859 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-12-14 12:56:01,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:57:04,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1215199#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 12:57:04,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:57:04,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:57:04,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 32 [2022-12-14 12:57:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106364212] [2022-12-14 12:57:04,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:57:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 12:57:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 12:57:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=11685, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 12:57:04,716 INFO L87 Difference]: Start difference. First operand 71104 states and 117821 transitions. Second operand has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2022-12-14 12:57:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:32,408 INFO L93 Difference]: Finished difference Result 178680 states and 347337 transitions. [2022-12-14 12:57:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-12-14 12:57:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) Word has length 150 [2022-12-14 12:57:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:33,198 INFO L225 Difference]: With dead ends: 178680 [2022-12-14 12:57:33,199 INFO L226 Difference]: Without dead ends: 109974 [2022-12-14 12:57:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 399 SyntacticMatches, 7 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20675 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=3753, Invalid=48003, Unknown=0, NotChecked=0, Total=51756 [2022-12-14 12:57:34,408 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 10179 mSDsluCounter, 10383 mSDsCounter, 0 mSdLazyCounter, 26089 mSolverCounterSat, 6705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10179 SdHoareTripleChecker+Valid, 11291 SdHoareTripleChecker+Invalid, 32794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6705 IncrementalHoareTripleChecker+Valid, 26089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:34,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10179 Valid, 11291 Invalid, 32794 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6705 Valid, 26089 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-12-14 12:57:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109974 states. [2022-12-14 12:57:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109974 to 81004. [2022-12-14 12:57:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81004 states, 55826 states have (on average 1.4157919249095403) internal successors, (79038), 59740 states have internal predecessors, (79038), 18535 states have call successors, (18535), 6168 states have call predecessors, (18535), 6642 states have return successors, (34364), 17035 states have call predecessors, (34364), 18383 states have call successors, (34364) [2022-12-14 12:57:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81004 states to 81004 states and 131937 transitions. [2022-12-14 12:57:42,359 INFO L78 Accepts]: Start accepts. Automaton has 81004 states and 131937 transitions. Word has length 150 [2022-12-14 12:57:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:42,360 INFO L495 AbstractCegarLoop]: Abstraction has 81004 states and 131937 transitions. [2022-12-14 12:57:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 6.583333333333333) internal successors, (158), 28 states have internal predecessors, (158), 14 states have call successors, (52), 7 states have call predecessors, (52), 16 states have return successors, (51), 15 states have call predecessors, (51), 14 states have call successors, (51) [2022-12-14 12:57:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 81004 states and 131937 transitions. [2022-12-14 12:57:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 12:57:42,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:42,367 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:57:42,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 12:57:42,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:57:42,568 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -882573556, now seen corresponding path program 1 times [2022-12-14 12:57:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:42,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218785946] [2022-12-14 12:57:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:57:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 12:57:42,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:57:42,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218785946] [2022-12-14 12:57:42,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218785946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:57:42,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:57:42,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:57:42,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635696995] [2022-12-14 12:57:42,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:57:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:57:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:57:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:57:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:57:42,710 INFO L87 Difference]: Start difference. First operand 81004 states and 131937 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 12:57:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:57:51,107 INFO L93 Difference]: Finished difference Result 157416 states and 264354 transitions. [2022-12-14 12:57:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:57:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) Word has length 152 [2022-12-14 12:57:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:57:51,637 INFO L225 Difference]: With dead ends: 157416 [2022-12-14 12:57:51,637 INFO L226 Difference]: Without dead ends: 81372 [2022-12-14 12:57:52,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:57:52,365 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 2 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:57:52,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2190 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:57:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81372 states. [2022-12-14 12:57:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81372 to 80111. [2022-12-14 12:57:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80111 states, 55183 states have (on average 1.415961437399199) internal successors, (78137), 59042 states have internal predecessors, (78137), 18286 states have call successors, (18286), 6103 states have call predecessors, (18286), 6641 states have return successors, (34062), 16905 states have call predecessors, (34062), 18134 states have call successors, (34062) [2022-12-14 12:57:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80111 states to 80111 states and 130485 transitions. [2022-12-14 12:57:59,582 INFO L78 Accepts]: Start accepts. Automaton has 80111 states and 130485 transitions. Word has length 152 [2022-12-14 12:57:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:57:59,583 INFO L495 AbstractCegarLoop]: Abstraction has 80111 states and 130485 transitions. [2022-12-14 12:57:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-14 12:57:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 80111 states and 130485 transitions. [2022-12-14 12:57:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-14 12:57:59,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:57:59,591 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:57:59,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 12:57:59,591 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:57:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:57:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2061591894, now seen corresponding path program 1 times [2022-12-14 12:57:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:57:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039622772] [2022-12-14 12:57:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:57:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:57:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 12:58:00,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:58:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039622772] [2022-12-14 12:58:00,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039622772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:58:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589584374] [2022-12-14 12:58:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:58:00,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:58:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:58:00,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:58:00,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:58:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:58:00,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:58:00,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:58:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 12:58:00,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:58:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 12:58:01,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589584374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:58:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [460609267] [2022-12-14 12:58:01,082 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-12-14 12:58:01,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:58:01,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:58:01,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:58:01,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:58:07,664 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 12:58:15,127 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 12:58:15,128 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 12:58:17,313 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 12:58:17,518 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 42 for LOIs [2022-12-14 12:58:17,522 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 12:58:21,130 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 12:58:21,711 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 12:58:21,861 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 68 for LOIs [2022-12-14 12:58:22,259 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 50 for LOIs [2022-12-14 12:58:22,682 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 47 for LOIs [2022-12-14 12:58:22,685 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 42 for LOIs [2022-12-14 12:58:22,694 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-12-14 12:58:22,704 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 68 for LOIs [2022-12-14 12:58:22,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:59:32,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1914932#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 12:59:32,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:59:32,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:59:32,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 10] total 36 [2022-12-14 12:59:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925678124] [2022-12-14 12:59:32,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:59:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:59:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:59:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:59:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=14661, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 12:59:32,659 INFO L87 Difference]: Start difference. First operand 80111 states and 130485 transitions. Second operand has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) [2022-12-14 13:00:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:00:00,895 INFO L93 Difference]: Finished difference Result 199638 states and 347600 transitions. [2022-12-14 13:00:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 13:00:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) Word has length 163 [2022-12-14 13:00:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:00:01,681 INFO L225 Difference]: With dead ends: 199638 [2022-12-14 13:00:01,681 INFO L226 Difference]: Without dead ends: 122832 [2022-12-14 13:00:02,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 424 SyntacticMatches, 9 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21524 ImplicationChecksByTransitivity, 73.3s TimeCoverageRelationStatistics Valid=3205, Invalid=50387, Unknown=0, NotChecked=0, Total=53592 [2022-12-14 13:00:02,516 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 10848 mSDsluCounter, 8732 mSDsCounter, 0 mSdLazyCounter, 27272 mSolverCounterSat, 6316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10848 SdHoareTripleChecker+Valid, 9382 SdHoareTripleChecker+Invalid, 33588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6316 IncrementalHoareTripleChecker+Valid, 27272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:00:02,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10848 Valid, 9382 Invalid, 33588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6316 Valid, 27272 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-12-14 13:00:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122832 states. [2022-12-14 13:00:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122832 to 113580. [2022-12-14 13:00:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113580 states, 78622 states have (on average 1.4139172241866145) internal successors, (111165), 83968 states have internal predecessors, (111165), 25653 states have call successors, (25653), 8520 states have call predecessors, (25653), 9304 states have return successors, (52905), 23887 states have call predecessors, (52905), 25454 states have call successors, (52905) [2022-12-14 13:00:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113580 states to 113580 states and 189723 transitions. [2022-12-14 13:00:14,942 INFO L78 Accepts]: Start accepts. Automaton has 113580 states and 189723 transitions. Word has length 163 [2022-12-14 13:00:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:00:14,943 INFO L495 AbstractCegarLoop]: Abstraction has 113580 states and 189723 transitions. [2022-12-14 13:00:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 6.142857142857143) internal successors, (172), 31 states have internal predecessors, (172), 15 states have call successors, (56), 8 states have call predecessors, (56), 16 states have return successors, (55), 19 states have call predecessors, (55), 15 states have call successors, (55) [2022-12-14 13:00:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 113580 states and 189723 transitions. [2022-12-14 13:00:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 13:00:14,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:00:14,949 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:00:14,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:00:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,150 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:00:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:00:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash 132694486, now seen corresponding path program 1 times [2022-12-14 13:00:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:00:15,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231860226] [2022-12-14 13:00:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:00:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 13:00:15,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:00:15,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231860226] [2022-12-14 13:00:15,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231860226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:00:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890103841] [2022-12-14 13:00:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:00:15,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:00:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:00:15,437 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:00:15,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:00:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:00:15,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:00:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:00:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 82 proven. 20 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-12-14 13:00:15,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:00:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 13:00:16,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890103841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:00:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985313736] [2022-12-14 13:00:16,340 INFO L159 IcfgInterpreter]: Started Sifa with 177 locations of interest [2022-12-14 13:00:16,340 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:00:16,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:00:16,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:00:16,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:00:22,368 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-12-14 13:00:30,432 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 13:00:32,644 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 13:00:32,854 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 443 for LOIs [2022-12-14 13:00:32,993 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 13:00:36,554 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 13:00:37,143 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 13:00:37,293 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 62 for LOIs [2022-12-14 13:00:37,304 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:00:57,113 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:01:53,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1985313736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:01:53,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:01:53,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 9, 8] total 47 [2022-12-14 13:01:53,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897816565] [2022-12-14 13:01:53,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:01:53,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 13:01:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:01:53,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 13:01:53,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1860, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 13:01:53,906 INFO L87 Difference]: Start difference. First operand 113580 states and 189723 transitions. Second operand has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2022-12-14 13:02:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:02:52,710 INFO L93 Difference]: Finished difference Result 227274 states and 379629 transitions. [2022-12-14 13:02:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:02:52,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) Word has length 270 [2022-12-14 13:02:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:02:53,660 INFO L225 Difference]: With dead ends: 227274 [2022-12-14 13:02:53,661 INFO L226 Difference]: Without dead ends: 113706 [2022-12-14 13:02:54,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 760 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 92.1s TimeCoverageRelationStatistics Valid=355, Invalid=2297, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:02:54,480 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 137 mSDsluCounter, 4438 mSDsCounter, 0 mSdLazyCounter, 7367 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 4981 SdHoareTripleChecker+Invalid, 7404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 7367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:02:54,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 4981 Invalid, 7404 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 7367 Invalid, 0 Unknown, 0 Unchecked, 30.6s Time] [2022-12-14 13:02:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113706 states. [2022-12-14 13:03:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113706 to 113627. [2022-12-14 13:03:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113627 states, 78658 states have (on average 1.4137659233644384) internal successors, (111204), 84003 states have internal predecessors, (111204), 25660 states have call successors, (25660), 8526 states have call predecessors, (25660), 9308 states have return successors, (52912), 23893 states have call predecessors, (52912), 25461 states have call successors, (52912) [2022-12-14 13:03:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113627 states to 113627 states and 189776 transitions. [2022-12-14 13:03:07,033 INFO L78 Accepts]: Start accepts. Automaton has 113627 states and 189776 transitions. Word has length 270 [2022-12-14 13:03:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:03:07,033 INFO L495 AbstractCegarLoop]: Abstraction has 113627 states and 189776 transitions. [2022-12-14 13:03:07,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 5.909090909090909) internal successors, (130), 16 states have internal predecessors, (130), 11 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2022-12-14 13:03:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 113627 states and 189776 transitions. [2022-12-14 13:03:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-12-14 13:03:07,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:03:07,041 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:03:07,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:03:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 13:03:07,242 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:03:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:03:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash 614186554, now seen corresponding path program 1 times [2022-12-14 13:03:07,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:03:07,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839858381] [2022-12-14 13:03:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:03:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 13:03:07,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:03:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839858381] [2022-12-14 13:03:07,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839858381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:03:07,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965010614] [2022-12-14 13:03:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:03:07,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:03:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:03:07,596 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:03:07,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:03:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:03:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:03:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:03:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 81 proven. 20 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 13:03:08,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:03:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 13:03:08,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965010614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:03:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556559012] [2022-12-14 13:03:08,518 INFO L159 IcfgInterpreter]: Started Sifa with 182 locations of interest [2022-12-14 13:03:08,518 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:03:08,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:03:08,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:03:08,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:03:14,081 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2022-12-14 13:03:27,319 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 13:03:29,541 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 13:03:29,749 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 443 for LOIs [2022-12-14 13:03:29,829 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 13:03:33,440 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 13:03:34,031 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 13:03:34,182 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 577 for LOIs [2022-12-14 13:03:35,428 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 445 for LOIs [2022-12-14 13:03:35,536 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 72 for LOIs [2022-12-14 13:03:35,546 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 116 for LOIs [2022-12-14 13:03:35,577 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:05:14,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1556559012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:14,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:05:14,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 8] total 60 [2022-12-14 13:05:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603917271] [2022-12-14 13:05:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:14,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 13:05:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:14,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 13:05:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3090, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 13:05:14,136 INFO L87 Difference]: Start difference. First operand 113627 states and 189776 transitions. Second operand has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2022-12-14 13:06:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:41,934 INFO L93 Difference]: Finished difference Result 225982 states and 375402 transitions. [2022-12-14 13:06:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:06:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 272 [2022-12-14 13:06:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:42,813 INFO L225 Difference]: With dead ends: 225982 [2022-12-14 13:06:42,813 INFO L226 Difference]: Without dead ends: 112414 [2022-12-14 13:06:43,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 733 SyntacticMatches, 33 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 146.5s TimeCoverageRelationStatistics Valid=636, Invalid=4766, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 13:06:43,702 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 276 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 8268 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 4275 SdHoareTripleChecker+Invalid, 8341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 8268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:43,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 4275 Invalid, 8341 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [73 Valid, 8268 Invalid, 0 Unknown, 0 Unchecked, 27.4s Time] [2022-12-14 13:06:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112414 states. [2022-12-14 13:06:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112414 to 112397. [2022-12-14 13:06:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112397 states, 78093 states have (on average 1.4169515833685478) internal successors, (110654), 83467 states have internal predecessors, (110654), 25218 states have call successors, (25218), 8234 states have call predecessors, (25218), 9085 states have return successors, (49778), 23491 states have call predecessors, (49778), 25090 states have call successors, (49778) [2022-12-14 13:06:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112397 states to 112397 states and 185650 transitions. [2022-12-14 13:06:56,438 INFO L78 Accepts]: Start accepts. Automaton has 112397 states and 185650 transitions. Word has length 272 [2022-12-14 13:06:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:56,438 INFO L495 AbstractCegarLoop]: Abstraction has 112397 states and 185650 transitions. [2022-12-14 13:06:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 4.090909090909091) internal successors, (135), 25 states have internal predecessors, (135), 15 states have call successors, (35), 11 states have call predecessors, (35), 9 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2022-12-14 13:06:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 112397 states and 185650 transitions. [2022-12-14 13:06:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-12-14 13:06:56,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:56,455 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:06:56,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:06:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 13:06:56,657 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -790995002, now seen corresponding path program 1 times [2022-12-14 13:06:56,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462042993] [2022-12-14 13:06:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:56,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-12-14 13:06:57,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462042993] [2022-12-14 13:06:57,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462042993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099486535] [2022-12-14 13:06:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:57,047 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:57,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f51280fc-a837-473e-95a1-55812851c13a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:06:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 4221 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:06:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 187 proven. 16 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-12-14 13:06:57,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:06:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-12-14 13:06:58,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099486535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:06:58,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447683009] [2022-12-14 13:06:58,162 INFO L159 IcfgInterpreter]: Started Sifa with 169 locations of interest [2022-12-14 13:06:58,162 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:06:58,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:06:58,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:06:58,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs