./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS --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 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 --- 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-8393723 [2022-11-19 06:48:14,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:48:14,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:48:14,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:48:14,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:48:14,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:48:14,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:48:14,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:48:14,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:48:14,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:48:14,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:48:14,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:48:14,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:48:14,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:48:14,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:48:14,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:48:14,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:48:14,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:48:14,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:48:14,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:48:14,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:48:14,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:48:14,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:48:14,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:48:14,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:48:14,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:48:14,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:48:14,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:48:14,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:48:14,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:48:14,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:48:14,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:48:14,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:48:14,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:48:14,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:48:14,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:48:14,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:48:14,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:48:14,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:48:14,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:48:14,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:48:14,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:48:14,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:48:14,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:48:14,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:48:14,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:48:14,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:48:14,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:48:14,945 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:48:14,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:48:14,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:48:14,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:48:14,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:48:14,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:48:14,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:48:14,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:48:14,948 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:48:14,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:48:14,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:48:14,949 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:48:14,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:48:14,950 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:48:14,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:48:14,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:48:14,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:48:14,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:48:14,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:48:14,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:48:14,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:48:14,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:48:14,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:48:14,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:48:14,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:48:14,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:48:14,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:48:14,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:48:14,954 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:48:14,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:48:14,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:48:14,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:48:14,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:48:14,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:48:14,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:48:14,956 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_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 [2022-11-19 06:48:15,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:48:15,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:48:15,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:48:15,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:48:15,298 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:48:15,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2022-11-19 06:48:15,392 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/data/d32e794eb/9d4e7771bf4f48a4955d83d9ce504feb/FLAGa590d8427 [2022-11-19 06:48:16,081 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:48:16,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2022-11-19 06:48:16,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/data/d32e794eb/9d4e7771bf4f48a4955d83d9ce504feb/FLAGa590d8427 [2022-11-19 06:48:16,265 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/data/d32e794eb/9d4e7771bf4f48a4955d83d9ce504feb [2022-11-19 06:48:16,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:48:16,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:48:16,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:48:16,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:48:16,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:48:16,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:48:16" (1/1) ... [2022-11-19 06:48:16,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a5de89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:16, skipping insertion in model container [2022-11-19 06:48:16,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:48:16" (1/1) ... [2022-11-19 06:48:16,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:48:16,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:48:16,879 WARN L234 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_b7d27918-b020-4d14-8128-6427145fe3c7/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2022-11-19 06:48:17,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:48:17,046 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:48:17,148 WARN L234 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_b7d27918-b020-4d14-8128-6427145fe3c7/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2022-11-19 06:48:17,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:48:17,215 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:48:17,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17 WrapperNode [2022-11-19 06:48:17,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:48:17,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:48:17,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:48:17,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:48:17,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,311 INFO L138 Inliner]: procedures = 96, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 922 [2022-11-19 06:48:17,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:48:17,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:48:17,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:48:17,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:48:17,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:48:17,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:48:17,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:48:17,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:48:17,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (1/1) ... [2022-11-19 06:48:17,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:48:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:17,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:48:17,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:48:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:48:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 06:48:17,524 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-19 06:48:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 06:48:17,524 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 06:48:17,524 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 06:48:17,524 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 06:48:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 06:48:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 06:48:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-19 06:48:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-19 06:48:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 06:48:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 06:48:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 06:48:17,526 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 06:48:17,526 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 06:48:17,527 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 06:48:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 06:48:17,527 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 06:48:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 06:48:17,527 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 06:48:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 06:48:17,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 06:48:17,527 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 06:48:17,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 06:48:17,528 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 06:48:17,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 06:48:17,528 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 06:48:17,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 06:48:17,529 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 06:48:17,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 06:48:17,529 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 06:48:17,529 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 06:48:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 06:48:17,530 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 06:48:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 06:48:17,530 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 06:48:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 06:48:17,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 06:48:17,530 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 06:48:17,531 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 06:48:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:48:17,531 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 06:48:17,532 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 06:48:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 06:48:17,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 06:48:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 06:48:17,533 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 06:48:17,534 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 06:48:17,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 06:48:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-19 06:48:17,535 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-19 06:48:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:48:17,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:48:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 06:48:17,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 06:48:17,757 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:48:17,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:48:19,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:48:20,032 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:48:20,032 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:48:20,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:48:20 BoogieIcfgContainer [2022-11-19 06:48:20,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:48:20,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:48:20,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:48:20,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:48:20,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:48:16" (1/3) ... [2022-11-19 06:48:20,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68faf7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:48:20, skipping insertion in model container [2022-11-19 06:48:20,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:48:17" (2/3) ... [2022-11-19 06:48:20,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68faf7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:48:20, skipping insertion in model container [2022-11-19 06:48:20,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:48:20" (3/3) ... [2022-11-19 06:48:20,046 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product23.cil.c [2022-11-19 06:48:20,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:48:20,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:48:20,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:48:20,196 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;@408eb782, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:48:20,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:48:20,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-19 06:48:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 06:48:20,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:20,246 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] [2022-11-19 06:48:20,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash -661733553, now seen corresponding path program 1 times [2022-11-19 06:48:20,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:20,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501619404] [2022-11-19 06:48:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:20,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501619404] [2022-11-19 06:48:20,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501619404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:20,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:20,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:48:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236638290] [2022-11-19 06:48:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:20,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:48:20,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:48:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:48:20,875 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-19 06:48:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:21,090 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2022-11-19 06:48:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:48:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-19 06:48:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:21,122 INFO L225 Difference]: With dead ends: 415 [2022-11-19 06:48:21,123 INFO L226 Difference]: Without dead ends: 393 [2022-11-19 06:48:21,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:48:21,135 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:21,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-19 06:48:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-19 06:48:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-19 06:48:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2022-11-19 06:48:21,219 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2022-11-19 06:48:21,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:21,221 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2022-11-19 06:48:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-19 06:48:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2022-11-19 06:48:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 06:48:21,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:21,227 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] [2022-11-19 06:48:21,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:48:21,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1854873761, now seen corresponding path program 1 times [2022-11-19 06:48:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:21,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103510048] [2022-11-19 06:48:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:21,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103510048] [2022-11-19 06:48:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103510048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:21,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:21,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:48:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630834788] [2022-11-19 06:48:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:21,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:48:21,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:48:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:48:21,827 INFO L87 Difference]: Start difference. First operand 393 states and 614 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 06:48:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:24,659 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2022-11-19 06:48:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:48:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-19 06:48:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:24,667 INFO L225 Difference]: With dead ends: 1210 [2022-11-19 06:48:24,671 INFO L226 Difference]: Without dead ends: 833 [2022-11-19 06:48:24,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:48:24,682 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:24,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1606 Invalid, 3115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 06:48:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-19 06:48:24,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-11-19 06:48:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-19 06:48:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2022-11-19 06:48:24,782 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2022-11-19 06:48:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:24,783 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2022-11-19 06:48:24,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 06:48:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2022-11-19 06:48:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 06:48:24,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:24,796 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] [2022-11-19 06:48:24,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:48:24,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:24,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1982041739, now seen corresponding path program 1 times [2022-11-19 06:48:24,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:24,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286807390] [2022-11-19 06:48:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:25,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:25,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286807390] [2022-11-19 06:48:25,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286807390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:25,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:25,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918368657] [2022-11-19 06:48:25,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:25,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:25,212 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:27,014 INFO L93 Difference]: Finished difference Result 2511 states and 4053 transitions. [2022-11-19 06:48:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2022-11-19 06:48:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:27,037 INFO L225 Difference]: With dead ends: 2511 [2022-11-19 06:48:27,038 INFO L226 Difference]: Without dead ends: 1743 [2022-11-19 06:48:27,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:27,051 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1229 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:27,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 710 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 06:48:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-11-19 06:48:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1577. [2022-11-19 06:48:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1103 states have (on average 1.5874886672710788) internal successors, (1751), 1166 states have internal predecessors, (1751), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2022-11-19 06:48:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2531 transitions. [2022-11-19 06:48:27,221 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2531 transitions. Word has length 82 [2022-11-19 06:48:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:27,223 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2531 transitions. [2022-11-19 06:48:27,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2531 transitions. [2022-11-19 06:48:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 06:48:27,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:27,230 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] [2022-11-19 06:48:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:48:27,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1313901329, now seen corresponding path program 1 times [2022-11-19 06:48:27,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:27,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924810945] [2022-11-19 06:48:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:27,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:27,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:27,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924810945] [2022-11-19 06:48:27,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924810945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:27,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:27,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:27,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011946785] [2022-11-19 06:48:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:27,530 INFO L87 Difference]: Start difference. First operand 1577 states and 2531 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:29,500 INFO L93 Difference]: Finished difference Result 4824 states and 7861 transitions. [2022-11-19 06:48:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 83 [2022-11-19 06:48:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:29,528 INFO L225 Difference]: With dead ends: 4824 [2022-11-19 06:48:29,528 INFO L226 Difference]: Without dead ends: 3264 [2022-11-19 06:48:29,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:29,539 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 1220 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:29,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 714 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 06:48:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2022-11-19 06:48:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3051. [2022-11-19 06:48:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 2157 states have (on average 1.5938803894297635) internal successors, (3438), 2287 states have internal predecessors, (3438), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2022-11-19 06:48:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4936 transitions. [2022-11-19 06:48:29,848 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4936 transitions. Word has length 83 [2022-11-19 06:48:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:29,848 INFO L495 AbstractCegarLoop]: Abstraction has 3051 states and 4936 transitions. [2022-11-19 06:48:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:29,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4936 transitions. [2022-11-19 06:48:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 06:48:29,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:29,852 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] [2022-11-19 06:48:29,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:48:29,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2076381193, now seen corresponding path program 1 times [2022-11-19 06:48:29,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402484871] [2022-11-19 06:48:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:30,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:30,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402484871] [2022-11-19 06:48:30,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402484871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:30,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:30,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799508839] [2022-11-19 06:48:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:30,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:30,056 INFO L87 Difference]: Start difference. First operand 3051 states and 4936 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:32,090 INFO L93 Difference]: Finished difference Result 9292 states and 15353 transitions. [2022-11-19 06:48:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-11-19 06:48:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:32,145 INFO L225 Difference]: With dead ends: 9292 [2022-11-19 06:48:32,146 INFO L226 Difference]: Without dead ends: 6260 [2022-11-19 06:48:32,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:32,172 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1203 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:32,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 727 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 06:48:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2022-11-19 06:48:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 5944. [2022-11-19 06:48:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5944 states, 4220 states have (on average 1.5938388625592417) internal successors, (6726), 4490 states have internal predecessors, (6726), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2022-11-19 06:48:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5944 states to 5944 states and 9720 transitions. [2022-11-19 06:48:32,793 INFO L78 Accepts]: Start accepts. Automaton has 5944 states and 9720 transitions. Word has length 84 [2022-11-19 06:48:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:32,794 INFO L495 AbstractCegarLoop]: Abstraction has 5944 states and 9720 transitions. [2022-11-19 06:48:32,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5944 states and 9720 transitions. [2022-11-19 06:48:32,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 06:48:32,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:32,805 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] [2022-11-19 06:48:32,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:48:32,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 56550705, now seen corresponding path program 1 times [2022-11-19 06:48:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:32,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469027618] [2022-11-19 06:48:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:33,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:33,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469027618] [2022-11-19 06:48:33,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469027618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:33,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:33,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329169938] [2022-11-19 06:48:33,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:33,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:33,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:33,070 INFO L87 Difference]: Start difference. First operand 5944 states and 9720 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:35,515 INFO L93 Difference]: Finished difference Result 18081 states and 30624 transitions. [2022-11-19 06:48:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:35,516 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), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2022-11-19 06:48:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:35,614 INFO L225 Difference]: With dead ends: 18081 [2022-11-19 06:48:35,614 INFO L226 Difference]: Without dead ends: 12160 [2022-11-19 06:48:35,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:35,652 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1190 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:35,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 739 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 06:48:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12160 states. [2022-11-19 06:48:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12160 to 11629. [2022-11-19 06:48:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11629 states, 8263 states have (on average 1.5904635120416313) internal successors, (13142), 8825 states have internal predecessors, (13142), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2022-11-19 06:48:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11629 states to 11629 states and 19396 transitions. [2022-11-19 06:48:36,909 INFO L78 Accepts]: Start accepts. Automaton has 11629 states and 19396 transitions. Word has length 85 [2022-11-19 06:48:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:36,910 INFO L495 AbstractCegarLoop]: Abstraction has 11629 states and 19396 transitions. [2022-11-19 06:48:36,911 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), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11629 states and 19396 transitions. [2022-11-19 06:48:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 06:48:36,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:36,914 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] [2022-11-19 06:48:36,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:48:36,915 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1752934009, now seen corresponding path program 1 times [2022-11-19 06:48:36,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:36,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518810115] [2022-11-19 06:48:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:36,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:48:37,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518810115] [2022-11-19 06:48:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518810115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:37,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:37,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32176989] [2022-11-19 06:48:37,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:37,161 INFO L87 Difference]: Start difference. First operand 11629 states and 19396 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:40,959 INFO L93 Difference]: Finished difference Result 35450 states and 62872 transitions. [2022-11-19 06:48:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-19 06:48:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:41,129 INFO L225 Difference]: With dead ends: 35450 [2022-11-19 06:48:41,129 INFO L226 Difference]: Without dead ends: 23842 [2022-11-19 06:48:41,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:41,200 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1181 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:41,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 753 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 06:48:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2022-11-19 06:48:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 22774. [2022-11-19 06:48:43,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22774 states, 16209 states have (on average 1.5886852982910729) internal successors, (25751), 17333 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2022-11-19 06:48:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22774 states to 22774 states and 39296 transitions. [2022-11-19 06:48:43,449 INFO L78 Accepts]: Start accepts. Automaton has 22774 states and 39296 transitions. Word has length 86 [2022-11-19 06:48:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:43,449 INFO L495 AbstractCegarLoop]: Abstraction has 22774 states and 39296 transitions. [2022-11-19 06:48:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 06:48:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 22774 states and 39296 transitions. [2022-11-19 06:48:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-19 06:48:43,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:43,465 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:48:43,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash 293093406, now seen corresponding path program 1 times [2022-11-19 06:48:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898644487] [2022-11-19 06:48:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:43,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-19 06:48:43,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898644487] [2022-11-19 06:48:43,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898644487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:43,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:48:43,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:48:43,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191463573] [2022-11-19 06:48:43,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:43,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:43,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:48:43,692 INFO L87 Difference]: Start difference. First operand 22774 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 06:48:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:45,916 INFO L93 Difference]: Finished difference Result 48807 states and 87571 transitions. [2022-11-19 06:48:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 134 [2022-11-19 06:48:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:46,078 INFO L225 Difference]: With dead ends: 48807 [2022-11-19 06:48:46,078 INFO L226 Difference]: Without dead ends: 26050 [2022-11-19 06:48:46,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:48:46,181 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 125 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:46,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1811 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:48:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26050 states. [2022-11-19 06:48:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26050 to 23014. [2022-11-19 06:48:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23014 states, 16432 states have (on average 1.5835564751703992) internal successors, (26021), 17540 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:48:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23014 states to 23014 states and 39600 transitions. [2022-11-19 06:48:48,359 INFO L78 Accepts]: Start accepts. Automaton has 23014 states and 39600 transitions. Word has length 134 [2022-11-19 06:48:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:48,360 INFO L495 AbstractCegarLoop]: Abstraction has 23014 states and 39600 transitions. [2022-11-19 06:48:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 06:48:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 23014 states and 39600 transitions. [2022-11-19 06:48:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 06:48:48,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:48,370 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:48,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:48:48,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 326576359, now seen corresponding path program 1 times [2022-11-19 06:48:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:48,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476099431] [2022-11-19 06:48:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-19 06:48:48,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:48,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476099431] [2022-11-19 06:48:48,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476099431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007767493] [2022-11-19 06:48:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:48,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:48,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:48,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:48:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:48:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 06:48:49,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:49,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007767493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:49,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:49,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-19 06:48:49,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143917425] [2022-11-19 06:48:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:49,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:48:49,460 INFO L87 Difference]: Start difference. First operand 23014 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:48:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:52,151 INFO L93 Difference]: Finished difference Result 48507 states and 86786 transitions. [2022-11-19 06:48:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-11-19 06:48:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:52,350 INFO L225 Difference]: With dead ends: 48507 [2022-11-19 06:48:52,350 INFO L226 Difference]: Without dead ends: 25510 [2022-11-19 06:48:52,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:48:52,474 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 213 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:52,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1509 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:48:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25510 states. [2022-11-19 06:48:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25510 to 25510. [2022-11-19 06:48:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25510 states, 18864 states have (on average 1.6270674300254453) internal successors, (30693), 19972 states have internal predecessors, (30693), 5071 states have call successors, (5071), 1319 states have call predecessors, (5071), 1574 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:48:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25510 states to 25510 states and 44272 transitions. [2022-11-19 06:48:55,151 INFO L78 Accepts]: Start accepts. Automaton has 25510 states and 44272 transitions. Word has length 141 [2022-11-19 06:48:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:48:55,152 INFO L495 AbstractCegarLoop]: Abstraction has 25510 states and 44272 transitions. [2022-11-19 06:48:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:48:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25510 states and 44272 transitions. [2022-11-19 06:48:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 06:48:55,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:48:55,160 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:48:55,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:48:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:55,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:48:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:48:55,369 INFO L85 PathProgramCache]: Analyzing trace with hash -703732548, now seen corresponding path program 1 times [2022-11-19 06:48:55,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:48:55,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858168581] [2022-11-19 06:48:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:48:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 06:48:55,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:48:55,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858168581] [2022-11-19 06:48:55,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858168581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:48:55,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832071330] [2022-11-19 06:48:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:48:55,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:48:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:48:55,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:48:55,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:48:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:48:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:48:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:48:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 06:48:56,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:48:56,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832071330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:48:56,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:48:56,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 06:48:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212346042] [2022-11-19 06:48:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:48:56,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:48:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:48:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:48:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:48:56,097 INFO L87 Difference]: Start difference. First operand 25510 states and 44272 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:48:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:48:58,231 INFO L93 Difference]: Finished difference Result 53499 states and 96064 transitions. [2022-11-19 06:48:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:48:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-19 06:48:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:48:58,396 INFO L225 Difference]: With dead ends: 53499 [2022-11-19 06:48:58,396 INFO L226 Difference]: Without dead ends: 28006 [2022-11-19 06:48:58,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:48:58,497 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 211 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:48:58,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1509 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:48:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28006 states. [2022-11-19 06:49:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28006 to 28006. [2022-11-19 06:49:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28006 states, 21296 states have (on average 1.6606404958677685) internal successors, (35365), 22404 states have internal predecessors, (35365), 5071 states have call successors, (5071), 1383 states have call predecessors, (5071), 1638 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:49:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28006 states to 28006 states and 48944 transitions. [2022-11-19 06:49:00,518 INFO L78 Accepts]: Start accepts. Automaton has 28006 states and 48944 transitions. Word has length 146 [2022-11-19 06:49:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:00,518 INFO L495 AbstractCegarLoop]: Abstraction has 28006 states and 48944 transitions. [2022-11-19 06:49:00,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:49:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28006 states and 48944 transitions. [2022-11-19 06:49:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-19 06:49:00,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:00,528 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:00,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:49:00,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1504346068, now seen corresponding path program 1 times [2022-11-19 06:49:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542941506] [2022-11-19 06:49:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-19 06:49:03,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542941506] [2022-11-19 06:49:03,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542941506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940933063] [2022-11-19 06:49:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:03,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:03,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:03,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:49:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1834 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:49:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:49:04,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:04,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940933063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:04,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:04,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-19 06:49:04,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884384329] [2022-11-19 06:49:04,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:49:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:49:04,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:49:04,222 INFO L87 Difference]: Start difference. First operand 28006 states and 48944 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:49:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:06,296 INFO L93 Difference]: Finished difference Result 58491 states and 105342 transitions. [2022-11-19 06:49:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:49:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 150 [2022-11-19 06:49:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:06,415 INFO L225 Difference]: With dead ends: 58491 [2022-11-19 06:49:06,415 INFO L226 Difference]: Without dead ends: 30502 [2022-11-19 06:49:06,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:49:06,486 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 209 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:06,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1509 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:49:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30502 states. [2022-11-19 06:49:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30502 to 30502. [2022-11-19 06:49:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30502 states, 23728 states have (on average 1.6873314227916385) internal successors, (40037), 24836 states have internal predecessors, (40037), 5071 states have call successors, (5071), 1447 states have call predecessors, (5071), 1702 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:49:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30502 states to 30502 states and 53616 transitions. [2022-11-19 06:49:08,377 INFO L78 Accepts]: Start accepts. Automaton has 30502 states and 53616 transitions. Word has length 150 [2022-11-19 06:49:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:08,378 INFO L495 AbstractCegarLoop]: Abstraction has 30502 states and 53616 transitions. [2022-11-19 06:49:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:49:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 30502 states and 53616 transitions. [2022-11-19 06:49:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-19 06:49:08,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:08,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:08,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:08,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:08,598 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash -534095267, now seen corresponding path program 1 times [2022-11-19 06:49:08,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:08,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581798248] [2022-11-19 06:49:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:08,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-19 06:49:11,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:11,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581798248] [2022-11-19 06:49:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581798248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:11,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448851956] [2022-11-19 06:49:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:11,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:11,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:11,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:11,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:49:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:49:11,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 06:49:11,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:11,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448851956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:11,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:11,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2022-11-19 06:49:11,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196901634] [2022-11-19 06:49:11,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:11,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:49:11,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:49:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:49:11,812 INFO L87 Difference]: Start difference. First operand 30502 states and 53616 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:49:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:13,315 INFO L93 Difference]: Finished difference Result 63483 states and 114620 transitions. [2022-11-19 06:49:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:49:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 153 [2022-11-19 06:49:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:13,428 INFO L225 Difference]: With dead ends: 63483 [2022-11-19 06:49:13,428 INFO L226 Difference]: Without dead ends: 32998 [2022-11-19 06:49:13,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:49:13,513 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 207 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:13,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1509 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:49:13,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32998 states. [2022-11-19 06:49:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32998 to 32998. [2022-11-19 06:49:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32998 states, 26160 states have (on average 1.709059633027523) internal successors, (44709), 27268 states have internal predecessors, (44709), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:49:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32998 states to 32998 states and 58288 transitions. [2022-11-19 06:49:15,498 INFO L78 Accepts]: Start accepts. Automaton has 32998 states and 58288 transitions. Word has length 153 [2022-11-19 06:49:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:15,499 INFO L495 AbstractCegarLoop]: Abstraction has 32998 states and 58288 transitions. [2022-11-19 06:49:15,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 06:49:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32998 states and 58288 transitions. [2022-11-19 06:49:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-19 06:49:15,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:15,508 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:15,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:49:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:15,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1406680171, now seen corresponding path program 1 times [2022-11-19 06:49:15,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:15,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660723216] [2022-11-19 06:49:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:49:17,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660723216] [2022-11-19 06:49:17,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660723216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:49:17,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914659337] [2022-11-19 06:49:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:17,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:49:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:49:17,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:49:17,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:49:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:49:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:49:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:49:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-19 06:49:18,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:49:18,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914659337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:49:18,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:49:18,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 25 [2022-11-19 06:49:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833597341] [2022-11-19 06:49:18,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:49:18,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:49:18,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:49:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:49:18,781 INFO L87 Difference]: Start difference. First operand 32998 states and 58288 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 06:49:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:49:20,858 INFO L93 Difference]: Finished difference Result 34139 states and 61716 transitions. [2022-11-19 06:49:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:49:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 155 [2022-11-19 06:49:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:49:21,092 INFO L225 Difference]: With dead ends: 34139 [2022-11-19 06:49:21,092 INFO L226 Difference]: Without dead ends: 33982 [2022-11-19 06:49:21,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:49:21,120 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 552 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:49:21,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 950 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:49:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33982 states. [2022-11-19 06:49:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33982 to 33060. [2022-11-19 06:49:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33060 states, 26222 states have (on average 1.7073831134162154) internal successors, (44771), 27330 states have internal predecessors, (44771), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-19 06:49:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33060 states to 33060 states and 58350 transitions. [2022-11-19 06:49:23,048 INFO L78 Accepts]: Start accepts. Automaton has 33060 states and 58350 transitions. Word has length 155 [2022-11-19 06:49:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:49:23,048 INFO L495 AbstractCegarLoop]: Abstraction has 33060 states and 58350 transitions. [2022-11-19 06:49:23,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 06:49:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33060 states and 58350 transitions. [2022-11-19 06:49:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-19 06:49:23,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:49:23,056 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:49:23,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 06:49:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d27918-b020-4d14-8128-6427145fe3c7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:49:23,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:49:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:49:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1556871455, now seen corresponding path program 1 times [2022-11-19 06:49:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:49:23,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991420667] [2022-11-19 06:49:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:49:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:49:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat