./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:10:26,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:10:26,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:10:26,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:10:26,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:10:26,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:10:26,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:10:26,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:10:26,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:10:26,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:10:26,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:10:26,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:10:26,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:10:26,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:10:26,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:10:26,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:10:26,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:10:26,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:10:26,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:10:26,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:10:26,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:10:26,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:10:26,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:10:26,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:10:26,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:10:26,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:10:26,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:10:26,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:10:26,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:10:26,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:10:26,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:10:26,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:10:26,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:10:26,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:10:26,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:10:26,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:10:26,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:10:26,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:10:26,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:10:26,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:10:26,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:10:26,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:10:26,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:10:26,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:10:26,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:10:26,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:10:26,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:10:26,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:10:26,157 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:10:26,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:10:26,157 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:10:26,158 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:10:26,159 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:10:26,159 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:10:26,159 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:10:26,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:10:26,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:10:26,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:10:26,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:10:26,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:10:26,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:10:26,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:10:26,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:10:26,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:10:26,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:10:26,161 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:10:26,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:10:26,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:10:26,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:10:26,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:10:26,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:10:26,163 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:10:26,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:10:26,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:10:26,164 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:10:26,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:10:26,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:10:26,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:10:26,165 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_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d12edbd4df2f08d75221f3c96b68e50e6394815b34a699d313e71ea24bf9c38 [2022-12-14 05:10:26,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:10:26,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:10:26,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:10:26,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:10:26,380 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:10:26,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-12-14 05:10:29,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:10:29,264 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:10:29,265 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c [2022-12-14 05:10:29,279 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/data/bdf55b28d/a51ad16a3d58442fa4f036d8a56e0ff8/FLAGb5c95c3eb [2022-12-14 05:10:29,291 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/data/bdf55b28d/a51ad16a3d58442fa4f036d8a56e0ff8 [2022-12-14 05:10:29,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:10:29,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:10:29,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:10:29,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:10:29,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:10:29,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc45331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29, skipping insertion in model container [2022-12-14 05:10:29,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:10:29,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:10:29,612 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-12-14 05:10:29,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:10:29,701 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:10:29,750 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/sv-benchmarks/c/product-lines/elevator_spec3_product29.cil.c[40506,40519] [2022-12-14 05:10:29,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:10:29,797 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:10:29,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29 WrapperNode [2022-12-14 05:10:29,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:10:29,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:10:29,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:10:29,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:10:29,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,855 INFO L138 Inliner]: procedures = 91, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 928 [2022-12-14 05:10:29,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:10:29,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:10:29,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:10:29,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:10:29,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,890 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:10:29,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:10:29,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:10:29,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:10:29,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (1/1) ... [2022-12-14 05:10:29,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:10:29,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:29,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:10:29,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:10:29,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 05:10:29,964 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 05:10:29,964 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 05:10:29,965 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 05:10:29,965 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 05:10:29,966 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 05:10:29,966 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 05:10:29,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 05:10:29,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:10:29,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:10:29,968 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 05:10:29,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 05:10:30,089 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:10:30,091 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:10:30,954 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:10:31,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:10:31,427 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:10:31,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:10:31 BoogieIcfgContainer [2022-12-14 05:10:31,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:10:31,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:10:31,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:10:31,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:10:31,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:10:29" (1/3) ... [2022-12-14 05:10:31,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4938ee4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:10:31, skipping insertion in model container [2022-12-14 05:10:31,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:29" (2/3) ... [2022-12-14 05:10:31,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4938ee4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:10:31, skipping insertion in model container [2022-12-14 05:10:31,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:10:31" (3/3) ... [2022-12-14 05:10:31,436 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2022-12-14 05:10:31,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:10:31,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:10:31,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:10:31,505 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;@2a8c4230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:10:31,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:10:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2022-12-14 05:10:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 05:10:31,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:31,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:31,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash 882097340, now seen corresponding path program 1 times [2022-12-14 05:10:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:31,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862282529] [2022-12-14 05:10:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:31,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:10:32,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862282529] [2022-12-14 05:10:32,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862282529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:32,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:32,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:10:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010141147] [2022-12-14 05:10:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:10:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:10:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:32,218 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:10:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:33,152 INFO L93 Difference]: Finished difference Result 1150 states and 1839 transitions. [2022-12-14 05:10:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:10:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-12-14 05:10:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:33,166 INFO L225 Difference]: With dead ends: 1150 [2022-12-14 05:10:33,166 INFO L226 Difference]: Without dead ends: 748 [2022-12-14 05:10:33,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:10:33,176 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 546 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:33,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 2990 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:10:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-14 05:10:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 740. [2022-12-14 05:10:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 497 states have (on average 1.5010060362173039) internal successors, (746), 527 states have internal predecessors, (746), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2022-12-14 05:10:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1139 transitions. [2022-12-14 05:10:33,266 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1139 transitions. Word has length 75 [2022-12-14 05:10:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:33,267 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1139 transitions. [2022-12-14 05:10:33,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:10:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1139 transitions. [2022-12-14 05:10:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 05:10:33,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:33,272 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:33,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:10:33,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash -662445484, now seen corresponding path program 1 times [2022-12-14 05:10:33,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:33,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199709099] [2022-12-14 05:10:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:33,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:10:33,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199709099] [2022-12-14 05:10:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199709099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:33,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:10:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:10:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525263025] [2022-12-14 05:10:33,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:33,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:10:33,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:10:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:10:33,580 INFO L87 Difference]: Start difference. First operand 740 states and 1139 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 05:10:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:34,531 INFO L93 Difference]: Finished difference Result 2669 states and 4283 transitions. [2022-12-14 05:10:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:10:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 81 [2022-12-14 05:10:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:34,542 INFO L225 Difference]: With dead ends: 2669 [2022-12-14 05:10:34,542 INFO L226 Difference]: Without dead ends: 1941 [2022-12-14 05:10:34,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:10:34,548 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 849 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 4030 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:34,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 4030 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:10:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-12-14 05:10:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1387. [2022-12-14 05:10:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 949 states have (on average 1.5047418335089568) internal successors, (1428), 1007 states have internal predecessors, (1428), 351 states have call successors, (351), 91 states have call predecessors, (351), 86 states have return successors, (380), 326 states have call predecessors, (380), 345 states have call successors, (380) [2022-12-14 05:10:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2159 transitions. [2022-12-14 05:10:34,632 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2159 transitions. Word has length 81 [2022-12-14 05:10:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:34,633 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 2159 transitions. [2022-12-14 05:10:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 05:10:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2159 transitions. [2022-12-14 05:10:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 05:10:34,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:34,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:10:34,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:34,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1358136434, now seen corresponding path program 1 times [2022-12-14 05:10:34,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231010046] [2022-12-14 05:10:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:34,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:10:34,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231010046] [2022-12-14 05:10:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231010046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486696392] [2022-12-14 05:10:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:34,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:34,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:10:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:35,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:35,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486696392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:35,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:35,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:10:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967030233] [2022-12-14 05:10:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:35,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:35,192 INFO L87 Difference]: Start difference. First operand 1387 states and 2159 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:10:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:35,425 INFO L93 Difference]: Finished difference Result 3959 states and 6319 transitions. [2022-12-14 05:10:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 80 [2022-12-14 05:10:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:35,440 INFO L225 Difference]: With dead ends: 3959 [2022-12-14 05:10:35,440 INFO L226 Difference]: Without dead ends: 2584 [2022-12-14 05:10:35,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:35,449 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 561 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:35,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-12-14 05:10:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2509. [2022-12-14 05:10:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1727 states have (on average 1.5176606832657789) internal successors, (2621), 1843 states have internal predecessors, (2621), 620 states have call successors, (620), 162 states have call predecessors, (620), 161 states have return successors, (700), 579 states have call predecessors, (700), 614 states have call successors, (700) [2022-12-14 05:10:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3941 transitions. [2022-12-14 05:10:35,570 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3941 transitions. Word has length 80 [2022-12-14 05:10:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:35,571 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3941 transitions. [2022-12-14 05:10:35,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:10:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3941 transitions. [2022-12-14 05:10:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 05:10:35,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:35,574 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:35,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:35,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1112970604, now seen corresponding path program 1 times [2022-12-14 05:10:35,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404357953] [2022-12-14 05:10:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:10:36,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404357953] [2022-12-14 05:10:36,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404357953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238499442] [2022-12-14 05:10:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:36,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:36,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:10:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:10:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:36,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:36,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238499442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:36,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:36,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:10:36,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630103493] [2022-12-14 05:10:36,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:36,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:36,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:36,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:36,342 INFO L87 Difference]: Start difference. First operand 2509 states and 3941 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:10:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:36,588 INFO L93 Difference]: Finished difference Result 5622 states and 8926 transitions. [2022-12-14 05:10:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 81 [2022-12-14 05:10:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:36,606 INFO L225 Difference]: With dead ends: 5622 [2022-12-14 05:10:36,607 INFO L226 Difference]: Without dead ends: 3125 [2022-12-14 05:10:36,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:10:36,621 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 559 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:36,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 1178 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2022-12-14 05:10:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3082. [2022-12-14 05:10:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 2129 states have (on average 1.5274776890558948) internal successors, (3252), 2274 states have internal predecessors, (3252), 755 states have call successors, (755), 196 states have call predecessors, (755), 197 states have return successors, (854), 707 states have call predecessors, (854), 749 states have call successors, (854) [2022-12-14 05:10:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4861 transitions. [2022-12-14 05:10:36,793 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4861 transitions. Word has length 81 [2022-12-14 05:10:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4861 transitions. [2022-12-14 05:10:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:10:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4861 transitions. [2022-12-14 05:10:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 05:10:36,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:36,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:36,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:10:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:36,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -922219511, now seen corresponding path program 1 times [2022-12-14 05:10:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:36,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593219473] [2022-12-14 05:10:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:10:37,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:37,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593219473] [2022-12-14 05:10:37,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593219473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:37,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929414651] [2022-12-14 05:10:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:37,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:37,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:37,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:37,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:10:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1608 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:10:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:10:37,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:37,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929414651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:37,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:37,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 05:10:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54907934] [2022-12-14 05:10:37,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:10:37,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:10:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:10:37,702 INFO L87 Difference]: Start difference. First operand 3082 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 05:10:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:38,135 INFO L93 Difference]: Finished difference Result 6167 states and 9944 transitions. [2022-12-14 05:10:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:10:38,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 86 [2022-12-14 05:10:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:38,151 INFO L225 Difference]: With dead ends: 6167 [2022-12-14 05:10:38,151 INFO L226 Difference]: Without dead ends: 3902 [2022-12-14 05:10:38,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:38,159 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 210 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:38,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 2430 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:10:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-12-14 05:10:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3286. [2022-12-14 05:10:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2271 states have (on average 1.520035226772347) internal successors, (3452), 2437 states have internal predecessors, (3452), 814 states have call successors, (814), 196 states have call predecessors, (814), 200 states have return successors, (925), 766 states have call predecessors, (925), 808 states have call successors, (925) [2022-12-14 05:10:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 5191 transitions. [2022-12-14 05:10:38,294 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 5191 transitions. Word has length 86 [2022-12-14 05:10:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:38,294 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 5191 transitions. [2022-12-14 05:10:38,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 05:10:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 5191 transitions. [2022-12-14 05:10:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 05:10:38,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:38,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:38,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash -743671102, now seen corresponding path program 1 times [2022-12-14 05:10:38,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:38,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638407083] [2022-12-14 05:10:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:38,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:10:38,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638407083] [2022-12-14 05:10:38,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638407083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:38,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328015148] [2022-12-14 05:10:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:38,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:38,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:38,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:38,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:10:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:39,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:10:39,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:10:39,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:39,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328015148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:39,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:39,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:10:39,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193087142] [2022-12-14 05:10:39,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:39,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:10:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:39,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:10:39,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:39,317 INFO L87 Difference]: Start difference. First operand 3286 states and 5191 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:10:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:40,189 INFO L93 Difference]: Finished difference Result 5778 states and 9149 transitions. [2022-12-14 05:10:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:10:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 89 [2022-12-14 05:10:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:40,208 INFO L225 Difference]: With dead ends: 5778 [2022-12-14 05:10:40,208 INFO L226 Difference]: Without dead ends: 3325 [2022-12-14 05:10:40,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:10:40,221 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 509 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:40,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2356 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:10:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-12-14 05:10:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3322. [2022-12-14 05:10:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 2295 states have (on average 1.5145969498910676) internal successors, (3476), 2457 states have internal predecessors, (3476), 814 states have call successors, (814), 200 states have call predecessors, (814), 212 states have return successors, (941), 778 states have call predecessors, (941), 808 states have call successors, (941) [2022-12-14 05:10:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5231 transitions. [2022-12-14 05:10:40,387 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5231 transitions. Word has length 89 [2022-12-14 05:10:40,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:40,387 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 5231 transitions. [2022-12-14 05:10:40,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 5 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:10:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5231 transitions. [2022-12-14 05:10:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:10:40,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:40,389 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:40,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:10:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:40,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash 21589652, now seen corresponding path program 1 times [2022-12-14 05:10:40,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:40,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593645857] [2022-12-14 05:10:40,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:10:40,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593645857] [2022-12-14 05:10:40,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593645857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272045755] [2022-12-14 05:10:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:40,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:40,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:40,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:10:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:41,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:10:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:10:41,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272045755] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:41,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:41,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-12-14 05:10:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332857069] [2022-12-14 05:10:41,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:10:41,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:10:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:10:41,269 INFO L87 Difference]: Start difference. First operand 3322 states and 5231 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:10:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:41,571 INFO L93 Difference]: Finished difference Result 6163 states and 9951 transitions. [2022-12-14 05:10:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:10:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-12-14 05:10:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:41,588 INFO L225 Difference]: With dead ends: 6163 [2022-12-14 05:10:41,589 INFO L226 Difference]: Without dead ends: 3674 [2022-12-14 05:10:41,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:10:41,603 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 219 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:41,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1594 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2022-12-14 05:10:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2022-12-14 05:10:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2637 states have (on average 1.5297686765263556) internal successors, (4034), 2809 states have internal predecessors, (4034), 814 states have call successors, (814), 200 states have call predecessors, (814), 222 states have return successors, (971), 778 states have call predecessors, (971), 808 states have call successors, (971) [2022-12-14 05:10:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5819 transitions. [2022-12-14 05:10:41,757 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5819 transitions. Word has length 92 [2022-12-14 05:10:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:41,757 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5819 transitions. [2022-12-14 05:10:41,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:10:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5819 transitions. [2022-12-14 05:10:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:10:41,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:41,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:41,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:41,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:41,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:41,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1015810986, now seen corresponding path program 1 times [2022-12-14 05:10:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:41,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402023911] [2022-12-14 05:10:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:10:42,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402023911] [2022-12-14 05:10:42,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402023911] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079611595] [2022-12-14 05:10:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:42,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:42,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:42,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:42,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:10:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:10:42,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:10:42,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:10:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:10:42,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079611595] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:42,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:10:42,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-12-14 05:10:42,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005420937] [2022-12-14 05:10:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:42,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:10:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:10:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:10:42,873 INFO L87 Difference]: Start difference. First operand 3674 states and 5819 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:10:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:45,787 INFO L93 Difference]: Finished difference Result 9688 states and 16293 transitions. [2022-12-14 05:10:45,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 05:10:45,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2022-12-14 05:10:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:45,821 INFO L225 Difference]: With dead ends: 9688 [2022-12-14 05:10:45,822 INFO L226 Difference]: Without dead ends: 7335 [2022-12-14 05:10:45,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:10:45,838 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 2577 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 3126 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:45,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2664 Valid, 3126 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 05:10:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-12-14 05:10:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6840. [2022-12-14 05:10:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1996), 1292 states have call predecessors, (1996), 1337 states have call successors, (1996) [2022-12-14 05:10:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11139 transitions. [2022-12-14 05:10:46,168 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11139 transitions. Word has length 92 [2022-12-14 05:10:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:46,168 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11139 transitions. [2022-12-14 05:10:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 4 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 05:10:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11139 transitions. [2022-12-14 05:10:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 05:10:46,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:46,171 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:46,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:10:46,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:46,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -953566422, now seen corresponding path program 1 times [2022-12-14 05:10:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:46,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766752466] [2022-12-14 05:10:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:10:46,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766752466] [2022-12-14 05:10:46,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766752466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068695804] [2022-12-14 05:10:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:46,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:46,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:10:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:10:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:10:46,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:46,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068695804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:46,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:46,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 05:10:46,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005862962] [2022-12-14 05:10:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:10:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:10:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:10:46,988 INFO L87 Difference]: Start difference. First operand 6840 states and 11139 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 05:10:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:47,649 INFO L93 Difference]: Finished difference Result 12375 states and 20284 transitions. [2022-12-14 05:10:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:10:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-12-14 05:10:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:47,684 INFO L225 Difference]: With dead ends: 12375 [2022-12-14 05:10:47,684 INFO L226 Difference]: Without dead ends: 6856 [2022-12-14 05:10:47,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:47,710 INFO L413 NwaCegarLoop]: 738 mSDtfsCounter, 419 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2610 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:10:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6856 states. [2022-12-14 05:10:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6856 to 6840. [2022-12-14 05:10:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 5049 states have (on average 1.5444642503466033) internal successors, (7798), 5313 states have internal predecessors, (7798), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 445 states have return successors, (1988), 1292 states have call predecessors, (1988), 1337 states have call successors, (1988) [2022-12-14 05:10:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 11131 transitions. [2022-12-14 05:10:48,028 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 11131 transitions. Word has length 96 [2022-12-14 05:10:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:48,029 INFO L495 AbstractCegarLoop]: Abstraction has 6840 states and 11131 transitions. [2022-12-14 05:10:48,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 05:10:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 11131 transitions. [2022-12-14 05:10:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:10:48,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:48,046 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:48,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:48,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1491089176, now seen corresponding path program 1 times [2022-12-14 05:10:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600151909] [2022-12-14 05:10:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 05:10:48,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600151909] [2022-12-14 05:10:48,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600151909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130878184] [2022-12-14 05:10:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:48,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:48,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:10:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:48,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:10:48,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:10:48,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130878184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:48,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:48,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:10:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706511405] [2022-12-14 05:10:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:48,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:10:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:10:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:48,818 INFO L87 Difference]: Start difference. First operand 6840 states and 11131 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:10:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:49,190 INFO L93 Difference]: Finished difference Result 13215 states and 22058 transitions. [2022-12-14 05:10:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:10:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 124 [2022-12-14 05:10:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:49,221 INFO L225 Difference]: With dead ends: 13215 [2022-12-14 05:10:49,221 INFO L226 Difference]: Without dead ends: 7220 [2022-12-14 05:10:49,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:49,249 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 13 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:49,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3619 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2022-12-14 05:10:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 7068. [2022-12-14 05:10:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 5193 states have (on average 1.5293664548430579) internal successors, (7942), 5497 states have internal predecessors, (7942), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1336 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-12-14 05:10:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 11740 transitions. [2022-12-14 05:10:49,559 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 11740 transitions. Word has length 124 [2022-12-14 05:10:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:49,560 INFO L495 AbstractCegarLoop]: Abstraction has 7068 states and 11740 transitions. [2022-12-14 05:10:49,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:10:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 11740 transitions. [2022-12-14 05:10:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 05:10:49,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:49,563 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:49,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:10:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:10:49,764 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1667819630, now seen corresponding path program 1 times [2022-12-14 05:10:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:49,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744080783] [2022-12-14 05:10:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 05:10:50,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744080783] [2022-12-14 05:10:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744080783] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449882589] [2022-12-14 05:10:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:50,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:10:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:10:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:10:50,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:50,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449882589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:50,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:50,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:10:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127151459] [2022-12-14 05:10:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:50,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:10:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:10:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:50,383 INFO L87 Difference]: Start difference. First operand 7068 states and 11740 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:10:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:50,758 INFO L93 Difference]: Finished difference Result 13551 states and 22861 transitions. [2022-12-14 05:10:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:10:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 125 [2022-12-14 05:10:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:50,786 INFO L225 Difference]: With dead ends: 13551 [2022-12-14 05:10:50,786 INFO L226 Difference]: Without dead ends: 7336 [2022-12-14 05:10:50,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:50,810 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 13 mSDsluCounter, 3043 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:50,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3662 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7336 states. [2022-12-14 05:10:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7336 to 7096. [2022-12-14 05:10:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5221 states have (on average 1.5265274851561004) internal successors, (7970), 5497 states have internal predecessors, (7970), 1345 states have call successors, (1345), 378 states have call predecessors, (1345), 529 states have return successors, (2453), 1364 states have call predecessors, (2453), 1337 states have call successors, (2453) [2022-12-14 05:10:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 11768 transitions. [2022-12-14 05:10:51,142 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 11768 transitions. Word has length 125 [2022-12-14 05:10:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:51,143 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 11768 transitions. [2022-12-14 05:10:51,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-14 05:10:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 11768 transitions. [2022-12-14 05:10:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 05:10:51,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:51,146 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:51,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:10:51,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2087464385, now seen corresponding path program 1 times [2022-12-14 05:10:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623081762] [2022-12-14 05:10:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:10:51,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623081762] [2022-12-14 05:10:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623081762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683263140] [2022-12-14 05:10:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:51,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:51,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:10:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:10:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:10:51,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:51,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683263140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:51,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:51,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-12-14 05:10:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021752082] [2022-12-14 05:10:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:51,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:10:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:51,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:10:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:10:51,836 INFO L87 Difference]: Start difference. First operand 7096 states and 11768 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:10:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:52,275 INFO L93 Difference]: Finished difference Result 14754 states and 25979 transitions. [2022-12-14 05:10:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:10:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 127 [2022-12-14 05:10:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:52,311 INFO L225 Difference]: With dead ends: 14754 [2022-12-14 05:10:52,311 INFO L226 Difference]: Without dead ends: 8491 [2022-12-14 05:10:52,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:10:52,346 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 71 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1233 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2022-12-14 05:10:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8026. [2022-12-14 05:10:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8026 states, 6064 states have (on average 1.524571240105541) internal successors, (9245), 6340 states have internal predecessors, (9245), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1451 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-12-14 05:10:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8026 states to 8026 states and 13217 transitions. [2022-12-14 05:10:52,803 INFO L78 Accepts]: Start accepts. Automaton has 8026 states and 13217 transitions. Word has length 127 [2022-12-14 05:10:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:52,803 INFO L495 AbstractCegarLoop]: Abstraction has 8026 states and 13217 transitions. [2022-12-14 05:10:52,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:10:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8026 states and 13217 transitions. [2022-12-14 05:10:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 05:10:52,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:52,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:52,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:10:53,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:53,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2098800956, now seen corresponding path program 1 times [2022-12-14 05:10:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910289233] [2022-12-14 05:10:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:10:53,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910289233] [2022-12-14 05:10:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910289233] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889024639] [2022-12-14 05:10:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:53,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:53,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:53,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:53,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:10:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:10:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:10:53,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:53,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889024639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:53,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:53,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 05:10:53,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142920686] [2022-12-14 05:10:53,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:53,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:10:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:53,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:10:53,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:53,576 INFO L87 Difference]: Start difference. First operand 8026 states and 13217 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:10:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:54,020 INFO L93 Difference]: Finished difference Result 15467 states and 25815 transitions. [2022-12-14 05:10:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:10:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-12-14 05:10:54,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:54,055 INFO L225 Difference]: With dead ends: 15467 [2022-12-14 05:10:54,055 INFO L226 Difference]: Without dead ends: 8294 [2022-12-14 05:10:54,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:10:54,108 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 13 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:54,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3614 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:10:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2022-12-14 05:10:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 8054. [2022-12-14 05:10:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8054 states, 6092 states have (on average 1.5221602101116218) internal successors, (9273), 6340 states have internal predecessors, (9273), 1432 states have call successors, (1432), 378 states have call predecessors, (1432), 529 states have return successors, (2540), 1479 states have call predecessors, (2540), 1424 states have call successors, (2540) [2022-12-14 05:10:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8054 states to 8054 states and 13245 transitions. [2022-12-14 05:10:54,422 INFO L78 Accepts]: Start accepts. Automaton has 8054 states and 13245 transitions. Word has length 128 [2022-12-14 05:10:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:54,422 INFO L495 AbstractCegarLoop]: Abstraction has 8054 states and 13245 transitions. [2022-12-14 05:10:54,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:10:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8054 states and 13245 transitions. [2022-12-14 05:10:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-14 05:10:54,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:54,427 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:54,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:10:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:54,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1116285936, now seen corresponding path program 1 times [2022-12-14 05:10:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668414302] [2022-12-14 05:10:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 05:10:55,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668414302] [2022-12-14 05:10:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668414302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:55,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721901911] [2022-12-14 05:10:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:55,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:55,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:55,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:10:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:10:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:10:55,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:55,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721901911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:55,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:55,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 05:10:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666796595] [2022-12-14 05:10:55,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:55,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:10:55,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:10:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:10:55,311 INFO L87 Difference]: Start difference. First operand 8054 states and 13245 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:10:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:55,907 INFO L93 Difference]: Finished difference Result 15943 states and 26698 transitions. [2022-12-14 05:10:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:10:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 135 [2022-12-14 05:10:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:55,942 INFO L225 Difference]: With dead ends: 15943 [2022-12-14 05:10:55,943 INFO L226 Difference]: Without dead ends: 6778 [2022-12-14 05:10:55,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:10:55,988 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 220 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:55,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2870 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:10:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2022-12-14 05:10:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6778. [2022-12-14 05:10:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 4954 states have (on average 1.4745660072668552) internal successors, (7305), 5200 states have internal predecessors, (7305), 1312 states have call successors, (1312), 372 states have call predecessors, (1312), 511 states have return successors, (2384), 1349 states have call predecessors, (2384), 1304 states have call successors, (2384) [2022-12-14 05:10:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 11001 transitions. [2022-12-14 05:10:56,361 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 11001 transitions. Word has length 135 [2022-12-14 05:10:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:56,361 INFO L495 AbstractCegarLoop]: Abstraction has 6778 states and 11001 transitions. [2022-12-14 05:10:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:10:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 11001 transitions. [2022-12-14 05:10:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 05:10:56,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:56,365 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:56,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:10:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:10:56,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:56,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1845785504, now seen corresponding path program 1 times [2022-12-14 05:10:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:56,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784685314] [2022-12-14 05:10:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 05:10:56,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:56,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784685314] [2022-12-14 05:10:56,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784685314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:56,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141159900] [2022-12-14 05:10:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:56,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:56,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:56,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:10:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:10:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:10:57,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:57,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141159900] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:57,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:57,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 05:10:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869916017] [2022-12-14 05:10:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:57,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:10:57,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:10:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:10:57,146 INFO L87 Difference]: Start difference. First operand 6778 states and 11001 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:10:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:57,652 INFO L93 Difference]: Finished difference Result 14920 states and 24634 transitions. [2022-12-14 05:10:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:10:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 139 [2022-12-14 05:10:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:57,685 INFO L225 Difference]: With dead ends: 14920 [2022-12-14 05:10:57,686 INFO L226 Difference]: Without dead ends: 7611 [2022-12-14 05:10:57,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:10:57,718 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 281 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:57,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 2842 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:10:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2022-12-14 05:10:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 7554. [2022-12-14 05:10:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 5681 states have (on average 1.4673472980109137) internal successors, (8336), 5922 states have internal predecessors, (8336), 1338 states have call successors, (1338), 400 states have call predecessors, (1338), 534 states have return successors, (2234), 1375 states have call predecessors, (2234), 1330 states have call successors, (2234) [2022-12-14 05:10:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11908 transitions. [2022-12-14 05:10:58,031 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11908 transitions. Word has length 139 [2022-12-14 05:10:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:58,031 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11908 transitions. [2022-12-14 05:10:58,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:10:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11908 transitions. [2022-12-14 05:10:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 05:10:58,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:58,036 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:58,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:10:58,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:10:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -805008920, now seen corresponding path program 1 times [2022-12-14 05:10:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:10:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999603913] [2022-12-14 05:10:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:58,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:10:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:10:58,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:10:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999603913] [2022-12-14 05:10:58,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999603913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:10:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665946062] [2022-12-14 05:10:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:10:58,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:58,572 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:58,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:10:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:10:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:10:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:10:59,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:10:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665946062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:10:59,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:10:59,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 05:10:59,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279572016] [2022-12-14 05:10:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:10:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:10:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:10:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:10:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:10:59,192 INFO L87 Difference]: Start difference. First operand 7554 states and 11908 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:03,214 INFO L93 Difference]: Finished difference Result 30912 states and 50838 transitions. [2022-12-14 05:11:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:11:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) Word has length 140 [2022-12-14 05:11:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:03,334 INFO L225 Difference]: With dead ends: 30912 [2022-12-14 05:11:03,334 INFO L226 Difference]: Without dead ends: 23855 [2022-12-14 05:11:03,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:11:03,366 INFO L413 NwaCegarLoop]: 2190 mSDtfsCounter, 2818 mSDsluCounter, 4204 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2831 SdHoareTripleChecker+Valid, 6394 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:03,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2831 Valid, 6394 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2643 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 05:11:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23855 states. [2022-12-14 05:11:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23855 to 19866. [2022-12-14 05:11:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19866 states, 15275 states have (on average 1.4386252045826513) internal successors, (21975), 15749 states have internal predecessors, (21975), 3103 states have call successors, (3103), 1080 states have call predecessors, (3103), 1487 states have return successors, (6975), 3228 states have call predecessors, (6975), 3085 states have call successors, (6975) [2022-12-14 05:11:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19866 states to 19866 states and 32053 transitions. [2022-12-14 05:11:04,414 INFO L78 Accepts]: Start accepts. Automaton has 19866 states and 32053 transitions. Word has length 140 [2022-12-14 05:11:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:04,414 INFO L495 AbstractCegarLoop]: Abstraction has 19866 states and 32053 transitions. [2022-12-14 05:11:04,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 4 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19866 states and 32053 transitions. [2022-12-14 05:11:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 05:11:04,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:04,425 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:11:04,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:04,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:04,626 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1019574749, now seen corresponding path program 1 times [2022-12-14 05:11:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:04,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388902088] [2022-12-14 05:11:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 05:11:04,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388902088] [2022-12-14 05:11:04,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388902088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:04,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724169619] [2022-12-14 05:11:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:04,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:04,823 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:04,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:11:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:11:05,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724169619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:05,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:05,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 05:11:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694795198] [2022-12-14 05:11:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:05,027 INFO L87 Difference]: Start difference. First operand 19866 states and 32053 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:11:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:06,503 INFO L93 Difference]: Finished difference Result 39717 states and 66864 transitions. [2022-12-14 05:11:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 138 [2022-12-14 05:11:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:06,595 INFO L225 Difference]: With dead ends: 39717 [2022-12-14 05:11:06,595 INFO L226 Difference]: Without dead ends: 22251 [2022-12-14 05:11:06,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:06,687 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 105 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:06,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1369 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22251 states. [2022-12-14 05:11:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22251 to 20062. [2022-12-14 05:11:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20062 states, 15443 states have (on average 1.4356666450819142) internal successors, (22171), 15917 states have internal predecessors, (22171), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-12-14 05:11:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 32305 transitions. [2022-12-14 05:11:07,807 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 32305 transitions. Word has length 138 [2022-12-14 05:11:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:07,807 INFO L495 AbstractCegarLoop]: Abstraction has 20062 states and 32305 transitions. [2022-12-14 05:11:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:11:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 32305 transitions. [2022-12-14 05:11:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 05:11:07,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:07,817 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:11:07,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:11:08,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:11:08,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 840048946, now seen corresponding path program 1 times [2022-12-14 05:11:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:08,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180949870] [2022-12-14 05:11:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 05:11:08,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180949870] [2022-12-14 05:11:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180949870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417955075] [2022-12-14 05:11:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:08,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:08,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:08,184 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:11:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1973 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:11:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:11:08,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:08,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417955075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:08,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:08,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 05:11:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282006476] [2022-12-14 05:11:08,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:08,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:11:08,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:11:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:11:08,546 INFO L87 Difference]: Start difference. First operand 20062 states and 32305 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 05:11:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:11,993 INFO L93 Difference]: Finished difference Result 42989 states and 70658 transitions. [2022-12-14 05:11:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:11:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 138 [2022-12-14 05:11:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:12,097 INFO L225 Difference]: With dead ends: 42989 [2022-12-14 05:11:12,097 INFO L226 Difference]: Without dead ends: 22496 [2022-12-14 05:11:12,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:11:12,182 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 1669 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3875 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 3875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:12,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1705 Valid, 1769 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 3875 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:11:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22496 states. [2022-12-14 05:11:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22496 to 20042. [2022-12-14 05:11:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20042 states, 15423 states have (on average 1.4359722492381508) internal successors, (22147), 15897 states have internal predecessors, (22147), 3131 states have call successors, (3131), 1080 states have call predecessors, (3131), 1487 states have return successors, (7003), 3256 states have call predecessors, (7003), 3113 states have call successors, (7003) [2022-12-14 05:11:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20042 states to 20042 states and 32281 transitions. [2022-12-14 05:11:13,635 INFO L78 Accepts]: Start accepts. Automaton has 20042 states and 32281 transitions. Word has length 138 [2022-12-14 05:11:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:13,635 INFO L495 AbstractCegarLoop]: Abstraction has 20042 states and 32281 transitions. [2022-12-14 05:11:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 5 states have call successors, (25), 4 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2022-12-14 05:11:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20042 states and 32281 transitions. [2022-12-14 05:11:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:11:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:13,646 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:13,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:11:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:11:13,847 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash 209320809, now seen corresponding path program 1 times [2022-12-14 05:11:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820144283] [2022-12-14 05:11:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:11:14,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820144283] [2022-12-14 05:11:14,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820144283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921574090] [2022-12-14 05:11:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:14,305 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:14,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:11:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:11:14,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:14,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921574090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:14,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:14,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-12-14 05:11:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054937267] [2022-12-14 05:11:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:14,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:11:14,549 INFO L87 Difference]: Start difference. First operand 20042 states and 32281 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:11:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:16,177 INFO L93 Difference]: Finished difference Result 45870 states and 76443 transitions. [2022-12-14 05:11:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 146 [2022-12-14 05:11:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:16,308 INFO L225 Difference]: With dead ends: 45870 [2022-12-14 05:11:16,308 INFO L226 Difference]: Without dead ends: 25840 [2022-12-14 05:11:16,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:11:16,410 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 485 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:16,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1342 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2022-12-14 05:11:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 25498. [2022-12-14 05:11:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25498 states, 19716 states have (on average 1.4389835666463786) internal successors, (28371), 20318 states have internal predecessors, (28371), 3899 states have call successors, (3899), 1347 states have call predecessors, (3899), 1882 states have return successors, (8998), 4072 states have call predecessors, (8998), 3881 states have call successors, (8998) [2022-12-14 05:11:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25498 states to 25498 states and 41268 transitions. [2022-12-14 05:11:18,198 INFO L78 Accepts]: Start accepts. Automaton has 25498 states and 41268 transitions. Word has length 146 [2022-12-14 05:11:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:18,198 INFO L495 AbstractCegarLoop]: Abstraction has 25498 states and 41268 transitions. [2022-12-14 05:11:18,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-12-14 05:11:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25498 states and 41268 transitions. [2022-12-14 05:11:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:11:18,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:18,213 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:18,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:18,415 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 440615160, now seen corresponding path program 1 times [2022-12-14 05:11:18,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:18,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6733370] [2022-12-14 05:11:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:11:18,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:18,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6733370] [2022-12-14 05:11:18,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6733370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:18,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942024981] [2022-12-14 05:11:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:18,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:18,848 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:18,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:11:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:11:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 05:11:19,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 05:11:19,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942024981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:11:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945531817] [2022-12-14 05:11:19,554 INFO L159 IcfgInterpreter]: Started Sifa with 126 locations of interest [2022-12-14 05:11:19,554 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:11:19,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:11:19,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:11:19,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:11:23,137 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:11:29,251 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 499 for LOIs [2022-12-14 05:11:29,597 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:11:31,497 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:11:31,683 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:11:31,750 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:11:31,817 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:11:34,989 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:11:35,541 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:11:35,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:12:34,861 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 499 DAG size of output: 442 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:12:40,645 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 535 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:12:57,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1945531817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:12:57,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:12:57,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 6, 7] total 44 [2022-12-14 05:12:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525599805] [2022-12-14 05:12:57,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:12:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:12:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:12:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:12:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:12:57,236 INFO L87 Difference]: Start difference. First operand 25498 states and 41268 transitions. Second operand has 29 states, 21 states have (on average 4.142857142857143) internal successors, (87), 17 states have internal predecessors, (87), 11 states have call successors, (25), 8 states have call predecessors, (25), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-14 05:13:19,765 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 596 DAG size of output: 578 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:26,223 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 602 DAG size of output: 584 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:55,848 INFO L93 Difference]: Finished difference Result 51117 states and 82715 transitions. [2022-12-14 05:13:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:13:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 4.142857142857143) internal successors, (87), 17 states have internal predecessors, (87), 11 states have call successors, (25), 8 states have call predecessors, (25), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 159 [2022-12-14 05:13:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:55,958 INFO L225 Difference]: With dead ends: 51117 [2022-12-14 05:13:55,958 INFO L226 Difference]: Without dead ends: 25631 [2022-12-14 05:13:56,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 437 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 108.6s TimeCoverageRelationStatistics Valid=256, Invalid=2194, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:13:56,065 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 211 mSDsluCounter, 4842 mSDsCounter, 0 mSdLazyCounter, 7276 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 5457 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 7276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:56,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 5457 Invalid, 7333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 7276 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2022-12-14 05:13:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25631 states. [2022-12-14 05:13:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25631 to 25552. [2022-12-14 05:13:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25552 states, 19756 states have (on average 1.4383478436930552) internal successors, (28416), 20357 states have internal predecessors, (28416), 3908 states have call successors, (3908), 1353 states have call predecessors, (3908), 1887 states have return successors, (9007), 4081 states have call predecessors, (9007), 3890 states have call successors, (9007) [2022-12-14 05:13:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25552 states to 25552 states and 41331 transitions. [2022-12-14 05:13:57,687 INFO L78 Accepts]: Start accepts. Automaton has 25552 states and 41331 transitions. Word has length 159 [2022-12-14 05:13:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:57,687 INFO L495 AbstractCegarLoop]: Abstraction has 25552 states and 41331 transitions. [2022-12-14 05:13:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 4.142857142857143) internal successors, (87), 17 states have internal predecessors, (87), 11 states have call successors, (25), 8 states have call predecessors, (25), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-14 05:13:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 25552 states and 41331 transitions. [2022-12-14 05:13:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 05:13:57,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:57,697 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:57,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:13:57,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:57,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash -687068665, now seen corresponding path program 1 times [2022-12-14 05:13:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522619076] [2022-12-14 05:13:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:57,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 05:13:58,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:58,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522619076] [2022-12-14 05:13:58,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522619076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:58,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214213245] [2022-12-14 05:13:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:58,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:58,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:58,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:13:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:13:58,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:13:58,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 05:13:58,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214213245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530027714] [2022-12-14 05:13:58,861 INFO L159 IcfgInterpreter]: Started Sifa with 133 locations of interest [2022-12-14 05:13:58,861 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:13:58,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:13:58,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:13:58,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:14:02,257 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:14:10,209 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 60 for LOIs [2022-12-14 05:14:10,219 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:14:12,156 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:14:12,343 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:14:12,409 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:14:12,476 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:14:15,614 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:14:16,191 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:14:16,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:15:36,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [530027714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:36,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:15:36,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 6, 7] total 47 [2022-12-14 05:15:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576934777] [2022-12-14 05:15:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:15:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:15:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 05:15:36,837 INFO L87 Difference]: Start difference. First operand 25552 states and 41331 transitions. Second operand has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 05:16:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:27,954 INFO L93 Difference]: Finished difference Result 51095 states and 82683 transitions. [2022-12-14 05:16:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:16:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 166 [2022-12-14 05:16:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:28,063 INFO L225 Difference]: With dead ends: 51095 [2022-12-14 05:16:28,063 INFO L226 Difference]: Without dead ends: 25621 [2022-12-14 05:16:28,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 451 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 103.2s TimeCoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 05:16:28,161 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 202 mSDsluCounter, 4546 mSDsCounter, 0 mSdLazyCounter, 6324 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 5158 SdHoareTripleChecker+Invalid, 6373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:28,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 5158 Invalid, 6373 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 6324 Invalid, 0 Unknown, 0 Unchecked, 26.8s Time] [2022-12-14 05:16:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25621 states. [2022-12-14 05:16:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25621 to 25554. [2022-12-14 05:16:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25554 states, 19757 states have (on average 1.4382750417573518) internal successors, (28416), 20358 states have internal predecessors, (28416), 3908 states have call successors, (3908), 1354 states have call predecessors, (3908), 1888 states have return successors, (9007), 4081 states have call predecessors, (9007), 3890 states have call successors, (9007) [2022-12-14 05:16:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25554 states to 25554 states and 41331 transitions. [2022-12-14 05:16:29,925 INFO L78 Accepts]: Start accepts. Automaton has 25554 states and 41331 transitions. Word has length 166 [2022-12-14 05:16:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:29,925 INFO L495 AbstractCegarLoop]: Abstraction has 25554 states and 41331 transitions. [2022-12-14 05:16:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 4.043478260869565) internal successors, (93), 18 states have internal predecessors, (93), 12 states have call successors, (27), 8 states have call predecessors, (27), 9 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2022-12-14 05:16:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25554 states and 41331 transitions. [2022-12-14 05:16:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:16:29,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:29,937 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:16:29,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 05:16:30,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:30,138 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1119765018, now seen corresponding path program 1 times [2022-12-14 05:16:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:30,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743710883] [2022-12-14 05:16:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 05:16:30,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743710883] [2022-12-14 05:16:30,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743710883] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745958747] [2022-12-14 05:16:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:30,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:30,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:30,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:16:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2033 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:16:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:16:31,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:16:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 05:16:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745958747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:16:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738780098] [2022-12-14 05:16:31,348 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-12-14 05:16:31,349 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:16:31,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:16:31,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:16:31,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:16:36,842 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 681 for LOIs [2022-12-14 05:16:43,354 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 05:16:43,355 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 41 for LOIs [2022-12-14 05:16:43,957 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 52 for LOIs [2022-12-14 05:16:43,977 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:16:46,291 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:16:46,493 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 101 for LOIs [2022-12-14 05:16:46,900 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 69 for LOIs [2022-12-14 05:16:46,911 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-12-14 05:16:46,915 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 72 for LOIs [2022-12-14 05:16:46,938 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 51 for LOIs [2022-12-14 05:16:46,942 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:16:50,387 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:16:50,930 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:16:51,094 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:17:52,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '874873#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 05:17:52,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:17:52,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:17:52,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 7] total 26 [2022-12-14 05:17:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975145429] [2022-12-14 05:17:52,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:17:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 05:17:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:17:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 05:17:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=11490, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 05:17:52,603 INFO L87 Difference]: Start difference. First operand 25554 states and 41331 transitions. Second operand has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) [2022-12-14 05:18:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:05,602 INFO L93 Difference]: Finished difference Result 67767 states and 122615 transitions. [2022-12-14 05:18:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 05:18:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) Word has length 159 [2022-12-14 05:18:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:05,878 INFO L225 Difference]: With dead ends: 67767 [2022-12-14 05:18:05,878 INFO L226 Difference]: Without dead ends: 44431 [2022-12-14 05:18:06,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 400 SyntacticMatches, 11 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10973 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=1753, Invalid=25637, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 05:18:06,064 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 8181 mSDsluCounter, 5420 mSDsCounter, 0 mSdLazyCounter, 18476 mSolverCounterSat, 5216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8181 SdHoareTripleChecker+Valid, 6016 SdHoareTripleChecker+Invalid, 23692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5216 IncrementalHoareTripleChecker+Valid, 18476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:06,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8181 Valid, 6016 Invalid, 23692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5216 Valid, 18476 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 05:18:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44431 states. [2022-12-14 05:18:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44431 to 41834. [2022-12-14 05:18:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41834 states, 30092 states have (on average 1.3842549514821214) internal successors, (41655), 31521 states have internal predecessors, (41655), 8153 states have call successors, (8153), 2888 states have call predecessors, (8153), 3588 states have return successors, (18106), 8048 states have call predecessors, (18106), 8116 states have call successors, (18106) [2022-12-14 05:18:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41834 states to 41834 states and 67914 transitions. [2022-12-14 05:18:09,474 INFO L78 Accepts]: Start accepts. Automaton has 41834 states and 67914 transitions. Word has length 159 [2022-12-14 05:18:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:09,474 INFO L495 AbstractCegarLoop]: Abstraction has 41834 states and 67914 transitions. [2022-12-14 05:18:09,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 18 states have (on average 9.277777777777779) internal successors, (167), 22 states have internal predecessors, (167), 13 states have call successors, (59), 5 states have call predecessors, (59), 14 states have return successors, (61), 16 states have call predecessors, (61), 13 states have call successors, (61) [2022-12-14 05:18:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41834 states and 67914 transitions. [2022-12-14 05:18:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 05:18:09,539 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:09,539 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:18:09,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 05:18:09,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 05:18:09,741 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash -117221076, now seen corresponding path program 1 times [2022-12-14 05:18:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:09,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283498829] [2022-12-14 05:18:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:09,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 05:18:10,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283498829] [2022-12-14 05:18:10,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283498829] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:18:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078353186] [2022-12-14 05:18:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:18:10,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:18:10,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 05:18:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:18:10,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:18:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 05:18:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:18:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 05:18:10,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078353186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:18:10,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129116177] [2022-12-14 05:18:10,725 INFO L159 IcfgInterpreter]: Started Sifa with 137 locations of interest [2022-12-14 05:18:10,725 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:18:10,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:18:10,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:18:10,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:18:14,120 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2022-12-14 05:18:23,634 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 498 for LOIs [2022-12-14 05:18:23,815 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-12-14 05:18:25,716 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-12-14 05:18:25,909 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 437 for LOIs [2022-12-14 05:18:25,976 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2022-12-14 05:18:26,042 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-12-14 05:18:29,187 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-12-14 05:18:29,739 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-12-14 05:18:29,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:20:03,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2129116177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:03,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:20:03,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 6, 7] total 49 [2022-12-14 05:20:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164840386] [2022-12-14 05:20:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 05:20:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:20:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 05:20:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 05:20:03,773 INFO L87 Difference]: Start difference. First operand 41834 states and 67914 transitions. Second operand has 33 states, 25 states have (on average 3.84) internal successors, (96), 19 states have internal predecessors, (96), 13 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-14 05:20:24,713 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 598 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:21:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:01,363 INFO L93 Difference]: Finished difference Result 83657 states and 135837 transitions. [2022-12-14 05:21:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:21:01,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 3.84) internal successors, (96), 19 states have internal predecessors, (96), 13 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 182 [2022-12-14 05:21:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:01,581 INFO L225 Difference]: With dead ends: 83657 [2022-12-14 05:21:01,581 INFO L226 Difference]: Without dead ends: 41903 [2022-12-14 05:21:01,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 497 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 117.1s TimeCoverageRelationStatistics Valid=279, Invalid=2691, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 05:21:01,820 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 231 mSDsluCounter, 4965 mSDsCounter, 0 mSdLazyCounter, 7689 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 5474 SdHoareTripleChecker+Invalid, 7746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 7689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:01,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 5474 Invalid, 7746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 7689 Invalid, 0 Unknown, 0 Unchecked, 30.9s Time] [2022-12-14 05:21:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41903 states. [2022-12-14 05:21:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41903 to 41836. [2022-12-14 05:21:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41836 states, 30093 states have (on average 1.3842089522480312) internal successors, (41655), 31522 states have internal predecessors, (41655), 8153 states have call successors, (8153), 2889 states have call predecessors, (8153), 3589 states have return successors, (18094), 8048 states have call predecessors, (18094), 8116 states have call successors, (18094) [2022-12-14 05:21:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41836 states to 41836 states and 67902 transitions. [2022-12-14 05:21:05,148 INFO L78 Accepts]: Start accepts. Automaton has 41836 states and 67902 transitions. Word has length 182 [2022-12-14 05:21:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:05,149 INFO L495 AbstractCegarLoop]: Abstraction has 41836 states and 67902 transitions. [2022-12-14 05:21:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 3.84) internal successors, (96), 19 states have internal predecessors, (96), 13 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-14 05:21:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 41836 states and 67902 transitions. [2022-12-14 05:21:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 05:21:05,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:05,158 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:21:05,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 05:21:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:05,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1555560286, now seen corresponding path program 1 times [2022-12-14 05:21:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678899199] [2022-12-14 05:21:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 05:21:05,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:05,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678899199] [2022-12-14 05:21:05,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678899199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:21:05,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629313164] [2022-12-14 05:21:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:05,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:05,478 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:05,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 05:21:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:05,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:21:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:21:05,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:05,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629313164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:05,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:21:05,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2022-12-14 05:21:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722262844] [2022-12-14 05:21:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:05,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:21:05,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:21:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:21:05,803 INFO L87 Difference]: Start difference. First operand 41836 states and 67902 transitions. Second operand has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 05:21:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:11,300 INFO L93 Difference]: Finished difference Result 86830 states and 142873 transitions. [2022-12-14 05:21:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:21:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) Word has length 168 [2022-12-14 05:21:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:11,640 INFO L225 Difference]: With dead ends: 86830 [2022-12-14 05:21:11,640 INFO L226 Difference]: Without dead ends: 49668 [2022-12-14 05:21:11,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:21:11,930 INFO L413 NwaCegarLoop]: 891 mSDtfsCounter, 622 mSDsluCounter, 3752 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 4643 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:11,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 4643 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:21:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49668 states. [2022-12-14 05:21:15,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49668 to 49176. [2022-12-14 05:21:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49176 states, 35518 states have (on average 1.3786812320513542) internal successors, (48968), 37051 states have internal predecessors, (48968), 9346 states have call successors, (9346), 3525 states have call predecessors, (9346), 4311 states have return successors, (21550), 9295 states have call predecessors, (21550), 9299 states have call successors, (21550) [2022-12-14 05:21:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49176 states to 49176 states and 79864 transitions. [2022-12-14 05:21:15,896 INFO L78 Accepts]: Start accepts. Automaton has 49176 states and 79864 transitions. Word has length 168 [2022-12-14 05:21:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:15,896 INFO L495 AbstractCegarLoop]: Abstraction has 49176 states and 79864 transitions. [2022-12-14 05:21:15,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 4 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 05:21:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 49176 states and 79864 transitions. [2022-12-14 05:21:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 05:21:15,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:15,912 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:15,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 05:21:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:16,114 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 154440047, now seen corresponding path program 1 times [2022-12-14 05:21:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:16,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645069846] [2022-12-14 05:21:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:16,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 05:21:16,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645069846] [2022-12-14 05:21:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645069846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:21:16,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916546340] [2022-12-14 05:21:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:16,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:16,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:16,259 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:16,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 05:21:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2059 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:21:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 05:21:16,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:16,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916546340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:16,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:21:16,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2022-12-14 05:21:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806607167] [2022-12-14 05:21:16,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:16,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:21:16,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:21:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:21:16,598 INFO L87 Difference]: Start difference. First operand 49176 states and 79864 transitions. Second operand has 10 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 5 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 05:21:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:22,805 INFO L93 Difference]: Finished difference Result 91761 states and 151218 transitions. [2022-12-14 05:21:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:21:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 5 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 171 [2022-12-14 05:21:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:23,081 INFO L225 Difference]: With dead ends: 91761 [2022-12-14 05:21:23,081 INFO L226 Difference]: Without dead ends: 49470 [2022-12-14 05:21:23,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:21:23,330 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 828 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:23,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 4148 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 05:21:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49470 states. [2022-12-14 05:21:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49470 to 46911. [2022-12-14 05:21:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46911 states, 33959 states have (on average 1.3790747666303484) internal successors, (46832), 35445 states have internal predecessors, (46832), 8869 states have call successors, (8869), 3433 states have call predecessors, (8869), 4082 states have return successors, (18865), 8728 states have call predecessors, (18865), 8813 states have call successors, (18865) [2022-12-14 05:21:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46911 states to 46911 states and 74566 transitions. [2022-12-14 05:21:27,606 INFO L78 Accepts]: Start accepts. Automaton has 46911 states and 74566 transitions. Word has length 171 [2022-12-14 05:21:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 46911 states and 74566 transitions. [2022-12-14 05:21:27,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 5 states have call successors, (28), 3 states have call predecessors, (28), 6 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-12-14 05:21:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 46911 states and 74566 transitions. [2022-12-14 05:21:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 05:21:27,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:27,618 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:21:27,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 05:21:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 05:21:27,819 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 916783950, now seen corresponding path program 1 times [2022-12-14 05:21:27,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:27,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345729994] [2022-12-14 05:21:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:27,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 05:21:27,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:27,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345729994] [2022-12-14 05:21:27,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345729994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:21:27,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774938463] [2022-12-14 05:21:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:27,949 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:27,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:21:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:21:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:21:28,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:21:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774938463] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:28,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:21:28,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 05:21:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538677509] [2022-12-14 05:21:28,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:28,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:21:28,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:21:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:28,317 INFO L87 Difference]: Start difference. First operand 46911 states and 74566 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (30), 5 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 05:21:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:37,831 INFO L93 Difference]: Finished difference Result 129078 states and 210442 transitions. [2022-12-14 05:21:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:21:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (30), 5 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 172 [2022-12-14 05:21:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:38,295 INFO L225 Difference]: With dead ends: 129078 [2022-12-14 05:21:38,295 INFO L226 Difference]: Without dead ends: 82245 [2022-12-14 05:21:38,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:21:38,610 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 1613 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:38,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1782 Valid, 1682 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 05:21:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82245 states. [2022-12-14 05:21:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82245 to 71675. [2022-12-14 05:21:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71675 states, 51874 states have (on average 1.389366542005629) internal successors, (72072), 54226 states have internal predecessors, (72072), 13630 states have call successors, (13630), 5165 states have call predecessors, (13630), 6170 states have return successors, (28638), 13320 states have call predecessors, (28638), 13568 states have call successors, (28638) [2022-12-14 05:21:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71675 states to 71675 states and 114340 transitions. [2022-12-14 05:21:45,077 INFO L78 Accepts]: Start accepts. Automaton has 71675 states and 114340 transitions. Word has length 172 [2022-12-14 05:21:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:45,077 INFO L495 AbstractCegarLoop]: Abstraction has 71675 states and 114340 transitions. [2022-12-14 05:21:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (30), 5 states have call predecessors, (30), 5 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2022-12-14 05:21:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 71675 states and 114340 transitions. [2022-12-14 05:21:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 05:21:45,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:45,087 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:21:45,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:21:45,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 05:21:45,288 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash -544238718, now seen corresponding path program 1 times [2022-12-14 05:21:45,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:45,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699361737] [2022-12-14 05:21:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:45,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 05:21:45,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:45,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699361737] [2022-12-14 05:21:45,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699361737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:45,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:45,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:45,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452280200] [2022-12-14 05:21:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:45,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:45,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:45,475 INFO L87 Difference]: Start difference. First operand 71675 states and 114340 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:21:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:51,840 INFO L93 Difference]: Finished difference Result 128983 states and 206528 transitions. [2022-12-14 05:21:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:21:51,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 178 [2022-12-14 05:21:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:52,270 INFO L225 Difference]: With dead ends: 128983 [2022-12-14 05:21:52,270 INFO L226 Difference]: Without dead ends: 74646 [2022-12-14 05:21:52,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:52,577 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 18 mSDsluCounter, 2950 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3551 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:52,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3551 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:21:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74646 states. [2022-12-14 05:21:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74646 to 73651. [2022-12-14 05:21:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73651 states, 53210 states have (on average 1.380172899830859) internal successors, (73439), 55786 states have internal predecessors, (73439), 13649 states have call successors, (13649), 5165 states have call predecessors, (13649), 6791 states have return successors, (29962), 13736 states have call predecessors, (29962), 13587 states have call successors, (29962) [2022-12-14 05:21:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73651 states to 73651 states and 117050 transitions. [2022-12-14 05:21:59,043 INFO L78 Accepts]: Start accepts. Automaton has 73651 states and 117050 transitions. Word has length 178 [2022-12-14 05:21:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:59,044 INFO L495 AbstractCegarLoop]: Abstraction has 73651 states and 117050 transitions. [2022-12-14 05:21:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 5 states have internal predecessors, (89), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:21:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 73651 states and 117050 transitions. [2022-12-14 05:21:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 05:21:59,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:59,061 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:21:59,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 05:21:59,061 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash -824983914, now seen corresponding path program 1 times [2022-12-14 05:21:59,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:59,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982520777] [2022-12-14 05:21:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:59,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 05:21:59,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:59,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982520777] [2022-12-14 05:21:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982520777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:21:59,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:21:59,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:21:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204454669] [2022-12-14 05:21:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:21:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:21:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:21:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:21:59,230 INFO L87 Difference]: Start difference. First operand 73651 states and 117050 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:22:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:22:05,682 INFO L93 Difference]: Finished difference Result 131260 states and 208652 transitions. [2022-12-14 05:22:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:22:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 180 [2022-12-14 05:22:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:22:06,086 INFO L225 Difference]: With dead ends: 131260 [2022-12-14 05:22:06,086 INFO L226 Difference]: Without dead ends: 75213 [2022-12-14 05:22:06,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:22:06,381 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:22:06,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3556 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:22:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75213 states. [2022-12-14 05:22:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75213 to 73695. [2022-12-14 05:22:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73695 states, 53273 states have (on average 1.3794980571771818) internal successors, (73490), 55745 states have internal predecessors, (73490), 13642 states have call successors, (13642), 5165 states have call predecessors, (13642), 6779 states have return successors, (29927), 13821 states have call predecessors, (29927), 13580 states have call successors, (29927) [2022-12-14 05:22:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73695 states to 73695 states and 117059 transitions. [2022-12-14 05:22:12,868 INFO L78 Accepts]: Start accepts. Automaton has 73695 states and 117059 transitions. Word has length 180 [2022-12-14 05:22:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:22:12,869 INFO L495 AbstractCegarLoop]: Abstraction has 73695 states and 117059 transitions. [2022-12-14 05:22:12,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:22:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 73695 states and 117059 transitions. [2022-12-14 05:22:12,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-12-14 05:22:12,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:22:12,879 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:22:12,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 05:22:12,879 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:22:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:22:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 382474146, now seen corresponding path program 1 times [2022-12-14 05:22:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:22:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930962110] [2022-12-14 05:22:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:22:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:22:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:22:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 05:22:12,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:22:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930962110] [2022-12-14 05:22:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930962110] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:22:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453795504] [2022-12-14 05:22:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:22:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:22:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:22:12,997 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:22:12,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:22:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:22:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:22:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:22:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:22:13,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:22:13,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453795504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:22:13,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:22:13,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 05:22:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102369] [2022-12-14 05:22:13,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:22:13,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:22:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:22:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:22:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:22:13,288 INFO L87 Difference]: Start difference. First operand 73695 states and 117059 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 5 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) [2022-12-14 05:22:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:22:29,344 INFO L93 Difference]: Finished difference Result 226459 states and 381622 transitions. [2022-12-14 05:22:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:22:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 5 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) Word has length 193 [2022-12-14 05:22:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:22:30,439 INFO L225 Difference]: With dead ends: 226459 [2022-12-14 05:22:30,440 INFO L226 Difference]: Without dead ends: 152875 [2022-12-14 05:22:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:22:31,020 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 1625 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:22:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 1722 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 05:22:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152875 states. [2022-12-14 05:22:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152875 to 133128. [2022-12-14 05:22:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133128 states, 97249 states have (on average 1.3672428508262295) internal successors, (132963), 101300 states have internal predecessors, (132963), 23375 states have call successors, (23375), 9114 states have call predecessors, (23375), 12503 states have return successors, (60373), 24230 states have call predecessors, (60373), 23295 states have call successors, (60373) [2022-12-14 05:22:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133128 states to 133128 states and 216711 transitions. [2022-12-14 05:22:43,165 INFO L78 Accepts]: Start accepts. Automaton has 133128 states and 216711 transitions. Word has length 193 [2022-12-14 05:22:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:22:43,165 INFO L495 AbstractCegarLoop]: Abstraction has 133128 states and 216711 transitions. [2022-12-14 05:22:43,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 5 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) [2022-12-14 05:22:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 133128 states and 216711 transitions. [2022-12-14 05:22:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 05:22:43,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:22:43,173 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 05:22:43,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 05:22:43,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 05:22:43,374 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:22:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:22:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash 597995638, now seen corresponding path program 1 times [2022-12-14 05:22:43,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:22:43,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956376399] [2022-12-14 05:22:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:22:43,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:22:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:22:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 05:22:43,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:22:43,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956376399] [2022-12-14 05:22:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956376399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:22:43,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:22:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:22:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736890212] [2022-12-14 05:22:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:22:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:22:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:22:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:22:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:22:43,578 INFO L87 Difference]: Start difference. First operand 133128 states and 216711 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:22:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:22:57,008 INFO L93 Difference]: Finished difference Result 246264 states and 400842 transitions. [2022-12-14 05:22:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:22:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 180 [2022-12-14 05:22:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:22:57,888 INFO L225 Difference]: With dead ends: 246264 [2022-12-14 05:22:57,889 INFO L226 Difference]: Without dead ends: 135498 [2022-12-14 05:22:58,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:22:58,726 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 17 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:22:58,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3556 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:22:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135498 states. [2022-12-14 05:23:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135498 to 132036. [2022-12-14 05:23:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132036 states, 96599 states have (on average 1.3665358854646528) internal successors, (132006), 100248 states have internal predecessors, (132006), 23239 states have call successors, (23239), 9114 states have call predecessors, (23239), 12197 states have return successors, (59455), 24190 states have call predecessors, (59455), 23159 states have call successors, (59455) [2022-12-14 05:23:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132036 states to 132036 states and 214700 transitions. [2022-12-14 05:23:11,297 INFO L78 Accepts]: Start accepts. Automaton has 132036 states and 214700 transitions. Word has length 180 [2022-12-14 05:23:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:23:11,298 INFO L495 AbstractCegarLoop]: Abstraction has 132036 states and 214700 transitions. [2022-12-14 05:23:11,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 05:23:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 132036 states and 214700 transitions. [2022-12-14 05:23:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 05:23:11,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:23:11,310 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:23:11,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 05:23:11,310 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:23:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:23:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash 413060870, now seen corresponding path program 1 times [2022-12-14 05:23:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:23:11,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203289848] [2022-12-14 05:23:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:23:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 05:23:11,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:23:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203289848] [2022-12-14 05:23:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203289848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:23:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507506243] [2022-12-14 05:23:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:11,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:23:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:23:11,433 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:23:11,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_481ae631-af68-40e3-844b-3294bf995a91/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 05:23:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2142 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:23:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:23:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 65 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 05:23:11,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:23:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 05:23:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507506243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:23:12,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117595716] [2022-12-14 05:23:12,040 INFO L159 IcfgInterpreter]: Started Sifa with 150 locations of interest [2022-12-14 05:23:12,040 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:23:12,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:23:12,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:23:12,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs