./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:25:46,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:25:46,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:25:46,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:25:46,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:25:46,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:25:46,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:25:46,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:25:46,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:25:46,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:25:46,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:25:46,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:25:46,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:25:46,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:25:46,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:25:46,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:25:46,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:25:46,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:25:46,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:25:46,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:25:46,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:25:46,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:25:46,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:25:46,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:25:46,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:25:46,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:25:46,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:25:46,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:25:46,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:25:46,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:25:46,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:25:46,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:25:46,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:25:46,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:25:46,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:25:46,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:25:46,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:25:46,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:25:46,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:25:46,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:25:46,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:25:46,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:25:46,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:25:46,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:25:46,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:25:46,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:25:46,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:25:46,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:25:46,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:25:46,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:25:46,367 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:25:46,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:25:46,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:25:46,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:25:46,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:25:46,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:25:46,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:25:46,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:25:46,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:25:46,371 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:25:46,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:25:46,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:25:46,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:25:46,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:25:46,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:25:46,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:25:46,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:25:46,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:25:46,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:25:46,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:25:46,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:25:46,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:25:46,375 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:25:46,376 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:25:46,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:25:46,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:25:46,377 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_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-20 06:25:46,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:25:46,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:25:46,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:25:46,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:25:46,701 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:25:46,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-20 06:25:46,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/data/3d8734d14/8697d097ae81475ab5035c1a82ea1507/FLAG575fd6295 [2021-11-20 06:25:47,485 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:25:47,486 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-20 06:25:47,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/data/3d8734d14/8697d097ae81475ab5035c1a82ea1507/FLAG575fd6295 [2021-11-20 06:25:47,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/data/3d8734d14/8697d097ae81475ab5035c1a82ea1507 [2021-11-20 06:25:47,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:25:47,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:25:47,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:25:47,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:25:47,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:25:47,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:25:47" (1/1) ... [2021-11-20 06:25:47,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6bdf7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:47, skipping insertion in model container [2021-11-20 06:25:47,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:25:47" (1/1) ... [2021-11-20 06:25:47,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:25:47,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:25:48,468 WARN L230 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_430ecd32-3601-4b4e-9393-25bbe79897f1/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-20 06:25:48,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:25:48,503 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:25:48,654 WARN L230 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_430ecd32-3601-4b4e-9393-25bbe79897f1/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-20 06:25:48,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:25:48,695 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:25:48,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48 WrapperNode [2021-11-20 06:25:48,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:25:48,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:25:48,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:25:48,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:25:48,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,798 INFO L137 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 850 [2021-11-20 06:25:48,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:25:48,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:25:48,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:25:48,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:25:48,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:25:48,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:25:48,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:25:48,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:25:48,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (1/1) ... [2021-11-20 06:25:48,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:25:48,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:49,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:25:49,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:25:49,060 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 06:25:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 06:25:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:25:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 06:25:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 06:25:49,061 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 06:25:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 06:25:49,062 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 06:25:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 06:25:49,062 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 06:25:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 06:25:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 06:25:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 06:25:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 06:25:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 06:25:49,063 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 06:25:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 06:25:49,064 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 06:25:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 06:25:49,064 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 06:25:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 06:25:49,064 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 06:25:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 06:25:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 06:25:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 06:25:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 06:25:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 06:25:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 06:25:49,066 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 06:25:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 06:25:49,066 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 06:25:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-20 06:25:49,066 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-20 06:25:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 06:25:49,067 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 06:25:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 06:25:49,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 06:25:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 06:25:49,068 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 06:25:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:25:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 06:25:49,069 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 06:25:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 06:25:49,069 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 06:25:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 06:25:49,070 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 06:25:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:25:49,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:25:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 06:25:49,070 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 06:25:49,307 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:25:49,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:25:50,453 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:25:50,480 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:25:50,482 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:25:50,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:25:50 BoogieIcfgContainer [2021-11-20 06:25:50,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:25:50,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:25:50,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:25:50,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:25:50,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:25:47" (1/3) ... [2021-11-20 06:25:50,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac603e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:25:50, skipping insertion in model container [2021-11-20 06:25:50,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:25:48" (2/3) ... [2021-11-20 06:25:50,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac603e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:25:50, skipping insertion in model container [2021-11-20 06:25:50,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:25:50" (3/3) ... [2021-11-20 06:25:50,502 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2021-11-20 06:25:50,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:25:50,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:25:50,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:25:50,596 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:25:50,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:25:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-20 06:25:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:25:50,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:50,653 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:50,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -452819156, now seen corresponding path program 1 times [2021-11-20 06:25:50,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:50,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859421962] [2021-11-20 06:25:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:50,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:25:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:25:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:25:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:25:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859421962] [2021-11-20 06:25:51,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859421962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:51,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232031544] [2021-11-20 06:25:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:51,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:51,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:51,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:51,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:25:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:25:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:25:52,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:25:52,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232031544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:52,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:25:52,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2021-11-20 06:25:52,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521426214] [2021-11-20 06:25:52,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:25:52,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:25:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:25:52,412 INFO L87 Difference]: Start difference. First operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 06:25:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:52,502 INFO L93 Difference]: Finished difference Result 578 states and 964 transitions. [2021-11-20 06:25:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:25:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2021-11-20 06:25:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:52,545 INFO L225 Difference]: With dead ends: 578 [2021-11-20 06:25:52,545 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 06:25:52,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:25:52,554 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:52,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:25:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 06:25:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-20 06:25:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.7013888888888888) internal successors, (735), 453 states have internal predecessors, (735), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:25:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 918 transitions. [2021-11-20 06:25:52,666 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 918 transitions. Word has length 79 [2021-11-20 06:25:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:52,668 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 918 transitions. [2021-11-20 06:25:52,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 06:25:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 918 transitions. [2021-11-20 06:25:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 06:25:52,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:52,676 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:52,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:52,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:52,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1489058496, now seen corresponding path program 1 times [2021-11-20 06:25:52,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:52,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506344473] [2021-11-20 06:25:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:52,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:25:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:25:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:25:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:25:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:53,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:53,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506344473] [2021-11-20 06:25:53,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506344473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841010572] [2021-11-20 06:25:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:53,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:53,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:25:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:25:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:25:54,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:25:54,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841010572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:54,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:25:54,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:25:54,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783588762] [2021-11-20 06:25:54,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:54,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:25:54,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:25:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:25:54,164 INFO L87 Difference]: Start difference. First operand 549 states and 918 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:54,316 INFO L93 Difference]: Finished difference Result 1089 states and 1828 transitions. [2021-11-20 06:25:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:25:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-11-20 06:25:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:54,327 INFO L225 Difference]: With dead ends: 1089 [2021-11-20 06:25:54,327 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 06:25:54,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:25:54,338 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 14 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2705 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:25:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 06:25:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-20 06:25:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6990740740740742) internal successors, (734), 453 states have internal predecessors, (734), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:25:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 917 transitions. [2021-11-20 06:25:54,396 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 917 transitions. Word has length 81 [2021-11-20 06:25:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:54,396 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 917 transitions. [2021-11-20 06:25:54,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 917 transitions. [2021-11-20 06:25:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 06:25:54,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:54,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:54,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:54,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:54,613 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1789740480, now seen corresponding path program 1 times [2021-11-20 06:25:54,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:54,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341376816] [2021-11-20 06:25:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:54,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:25:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:55,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:25:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:55,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:55,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341376816] [2021-11-20 06:25:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341376816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099302605] [2021-11-20 06:25:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:55,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:55,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:55,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:25:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:25:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:25:55,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:25:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099302605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:55,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:25:55,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:25:55,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41620024] [2021-11-20 06:25:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:55,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:25:55,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:55,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:25:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:25:55,715 INFO L87 Difference]: Start difference. First operand 549 states and 917 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:55,805 INFO L93 Difference]: Finished difference Result 1089 states and 1826 transitions. [2021-11-20 06:25:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:25:55,807 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-20 06:25:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:55,814 INFO L225 Difference]: With dead ends: 1089 [2021-11-20 06:25:55,814 INFO L226 Difference]: Without dead ends: 549 [2021-11-20 06:25:55,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:25:55,820 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 12 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:55,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2705 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:25:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-20 06:25:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-20 06:25:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6967592592592593) internal successors, (733), 453 states have internal predecessors, (733), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:25:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 916 transitions. [2021-11-20 06:25:55,858 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 916 transitions. Word has length 83 [2021-11-20 06:25:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:55,859 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 916 transitions. [2021-11-20 06:25:55,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 916 transitions. [2021-11-20 06:25:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:25:55,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:55,862 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:55,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:56,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:56,077 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:56,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2051322496, now seen corresponding path program 1 times [2021-11-20 06:25:56,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073409351] [2021-11-20 06:25:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:56,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:25:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:25:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:25:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:25:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:56,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073409351] [2021-11-20 06:25:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073409351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902971208] [2021-11-20 06:25:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:56,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:56,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:56,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:25:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:25:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:25:57,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:25:57,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902971208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:57,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:25:57,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:25:57,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943811269] [2021-11-20 06:25:57,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:57,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:25:57,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:25:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:25:57,218 INFO L87 Difference]: Start difference. First operand 549 states and 916 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:57,357 INFO L93 Difference]: Finished difference Result 1096 states and 1833 transitions. [2021-11-20 06:25:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:25:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2021-11-20 06:25:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:57,367 INFO L225 Difference]: With dead ends: 1096 [2021-11-20 06:25:57,367 INFO L226 Difference]: Without dead ends: 558 [2021-11-20 06:25:57,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:25:57,389 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 20 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:57,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2705 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:25:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-20 06:25:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-20 06:25:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 440 states have (on average 1.6931818181818181) internal successors, (745), 461 states have internal predecessors, (745), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:25:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 928 transitions. [2021-11-20 06:25:57,422 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 928 transitions. Word has length 85 [2021-11-20 06:25:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:57,422 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 928 transitions. [2021-11-20 06:25:57,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 928 transitions. [2021-11-20 06:25:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 06:25:57,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:57,426 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:57,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 06:25:57,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:57,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:57,654 INFO L85 PathProgramCache]: Analyzing trace with hash -45070625, now seen corresponding path program 1 times [2021-11-20 06:25:57,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774845068] [2021-11-20 06:25:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:57,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:25:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:25:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:25:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:25:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:58,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:58,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774845068] [2021-11-20 06:25:58,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774845068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:58,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423278388] [2021-11-20 06:25:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:58,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:58,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:25:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:58,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:25:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:25:58,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:25:58,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423278388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:58,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:25:58,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:25:58,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470412526] [2021-11-20 06:25:58,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:58,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:25:58,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:58,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:25:58,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:25:58,643 INFO L87 Difference]: Start difference. First operand 558 states and 928 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:58,731 INFO L93 Difference]: Finished difference Result 1098 states and 1834 transitions. [2021-11-20 06:25:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:25:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-20 06:25:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:58,738 INFO L225 Difference]: With dead ends: 1098 [2021-11-20 06:25:58,738 INFO L226 Difference]: Without dead ends: 558 [2021-11-20 06:25:58,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:25:58,743 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 18 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:58,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2705 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:25:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-20 06:25:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-20 06:25:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 440 states have (on average 1.690909090909091) internal successors, (744), 461 states have internal predecessors, (744), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:25:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 927 transitions. [2021-11-20 06:25:58,786 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 927 transitions. Word has length 86 [2021-11-20 06:25:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 927 transitions. [2021-11-20 06:25:58,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:25:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 927 transitions. [2021-11-20 06:25:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:25:58,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:58,790 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:25:58,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:59,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:59,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 84493924, now seen corresponding path program 1 times [2021-11-20 06:25:59,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:59,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051269625] [2021-11-20 06:25:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:59,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:25:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:25:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:25:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:25:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:25:59,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:59,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051269625] [2021-11-20 06:25:59,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051269625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299991534] [2021-11-20 06:25:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:59,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:59,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:25:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:25:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:00,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:00,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299991534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:00,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:00,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:26:00,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292370947] [2021-11-20 06:26:00,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:00,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:00,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:00,018 INFO L87 Difference]: Start difference. First operand 558 states and 927 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:00,103 INFO L93 Difference]: Finished difference Result 1098 states and 1833 transitions. [2021-11-20 06:26:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:00,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-20 06:26:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:00,117 INFO L225 Difference]: With dead ends: 1098 [2021-11-20 06:26:00,117 INFO L226 Difference]: Without dead ends: 558 [2021-11-20 06:26:00,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:00,126 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 17 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:00,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2705 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-20 06:26:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-20 06:26:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 440 states have (on average 1.6886363636363637) internal successors, (743), 461 states have internal predecessors, (743), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:26:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 926 transitions. [2021-11-20 06:26:00,201 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 926 transitions. Word has length 87 [2021-11-20 06:26:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:00,202 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 926 transitions. [2021-11-20 06:26:00,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 926 transitions. [2021-11-20 06:26:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:26:00,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:00,204 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:00,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:00,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:00,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:00,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2128673661, now seen corresponding path program 1 times [2021-11-20 06:26:00,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:00,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568516216] [2021-11-20 06:26:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:00,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:26:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:00,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568516216] [2021-11-20 06:26:00,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568516216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219877693] [2021-11-20 06:26:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:00,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:00,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:00,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:26:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:26:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:01,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:01,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219877693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:01,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:01,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-20 06:26:01,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273625349] [2021-11-20 06:26:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:01,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:26:01,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:01,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:26:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:01,467 INFO L87 Difference]: Start difference. First operand 558 states and 926 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:01,630 INFO L93 Difference]: Finished difference Result 1117 states and 1863 transitions. [2021-11-20 06:26:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-20 06:26:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:01,638 INFO L225 Difference]: With dead ends: 1117 [2021-11-20 06:26:01,638 INFO L226 Difference]: Without dead ends: 581 [2021-11-20 06:26:01,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:01,643 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 148 mSDsluCounter, 4417 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5322 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:01,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5322 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-20 06:26:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 577. [2021-11-20 06:26:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 479 states have internal predecessors, (769), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-20 06:26:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 957 transitions. [2021-11-20 06:26:01,680 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 957 transitions. Word has length 88 [2021-11-20 06:26:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:01,681 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 957 transitions. [2021-11-20 06:26:01,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 957 transitions. [2021-11-20 06:26:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:26:01,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:01,690 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:01,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:01,905 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1682618308, now seen corresponding path program 1 times [2021-11-20 06:26:01,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:01,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299075616] [2021-11-20 06:26:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:01,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:26:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:02,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299075616] [2021-11-20 06:26:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299075616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598144607] [2021-11-20 06:26:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:02,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:02,425 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:02,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:26:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:02,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:02,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598144607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:02,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:02,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:26:02,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921363078] [2021-11-20 06:26:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:02,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:02,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:02,982 INFO L87 Difference]: Start difference. First operand 577 states and 957 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:03,131 INFO L93 Difference]: Finished difference Result 1158 states and 1937 transitions. [2021-11-20 06:26:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-11-20 06:26:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:03,139 INFO L225 Difference]: With dead ends: 1158 [2021-11-20 06:26:03,139 INFO L226 Difference]: Without dead ends: 577 [2021-11-20 06:26:03,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:03,144 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 135 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:03,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2522 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-20 06:26:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-20 06:26:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 456 states have (on average 1.6754385964912282) internal successors, (764), 479 states have internal predecessors, (764), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-20 06:26:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 952 transitions. [2021-11-20 06:26:03,183 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 952 transitions. Word has length 88 [2021-11-20 06:26:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:03,183 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 952 transitions. [2021-11-20 06:26:03,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 952 transitions. [2021-11-20 06:26:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 06:26:03,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:03,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:03,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:03,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:03,409 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1307445388, now seen corresponding path program 1 times [2021-11-20 06:26:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952213175] [2021-11-20 06:26:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:03,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:26:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:26:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:03,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952213175] [2021-11-20 06:26:03,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952213175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789235102] [2021-11-20 06:26:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:03,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:03,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:03,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:26:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:04,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:04,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789235102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:04,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:04,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:26:04,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266598868] [2021-11-20 06:26:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:04,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:04,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:04,441 INFO L87 Difference]: Start difference. First operand 577 states and 952 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:04,599 INFO L93 Difference]: Finished difference Result 1158 states and 1927 transitions. [2021-11-20 06:26:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 90 [2021-11-20 06:26:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:04,608 INFO L225 Difference]: With dead ends: 1158 [2021-11-20 06:26:04,608 INFO L226 Difference]: Without dead ends: 577 [2021-11-20 06:26:04,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:04,615 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 129 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:04,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2522 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-20 06:26:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-20 06:26:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 456 states have (on average 1.6644736842105263) internal successors, (759), 479 states have internal predecessors, (759), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-20 06:26:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 947 transitions. [2021-11-20 06:26:04,648 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 947 transitions. Word has length 90 [2021-11-20 06:26:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:04,648 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 947 transitions. [2021-11-20 06:26:04,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 947 transitions. [2021-11-20 06:26:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 06:26:04,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:04,651 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:04,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:04,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:04,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1155388188, now seen corresponding path program 1 times [2021-11-20 06:26:04,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:04,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341523606] [2021-11-20 06:26:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:04,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:26:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:26:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:05,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:05,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341523606] [2021-11-20 06:26:05,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341523606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370358883] [2021-11-20 06:26:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:05,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:05,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:05,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:26:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:05,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370358883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:05,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:26:05,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431313896] [2021-11-20 06:26:05,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:05,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:05,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:05,862 INFO L87 Difference]: Start difference. First operand 577 states and 947 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:06,052 INFO L93 Difference]: Finished difference Result 1194 states and 1975 transitions. [2021-11-20 06:26:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2021-11-20 06:26:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:06,059 INFO L225 Difference]: With dead ends: 1194 [2021-11-20 06:26:06,060 INFO L226 Difference]: Without dead ends: 643 [2021-11-20 06:26:06,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:06,064 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 179 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:06,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2532 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-20 06:26:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 628. [2021-11-20 06:26:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 506 states have (on average 1.66798418972332) internal successors, (844), 529 states have internal predecessors, (844), 95 states have call successors, (95), 25 states have call predecessors, (95), 26 states have return successors, (92), 87 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-20 06:26:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1031 transitions. [2021-11-20 06:26:06,096 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1031 transitions. Word has length 92 [2021-11-20 06:26:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:06,096 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1031 transitions. [2021-11-20 06:26:06,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1031 transitions. [2021-11-20 06:26:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:26:06,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:06,099 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:06,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:06,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:26:06,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2004653834, now seen corresponding path program 1 times [2021-11-20 06:26:06,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650201146] [2021-11-20 06:26:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:06,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:26:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:06,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650201146] [2021-11-20 06:26:06,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650201146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113225482] [2021-11-20 06:26:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:06,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:06,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:06,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:26:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:26:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:07,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113225482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:07,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:07,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2021-11-20 06:26:07,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382650362] [2021-11-20 06:26:07,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:07,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:07,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:07,460 INFO L87 Difference]: Start difference. First operand 628 states and 1031 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:07,648 INFO L93 Difference]: Finished difference Result 1186 states and 1955 transitions. [2021-11-20 06:26:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-20 06:26:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:07,655 INFO L225 Difference]: With dead ends: 1186 [2021-11-20 06:26:07,656 INFO L226 Difference]: Without dead ends: 650 [2021-11-20 06:26:07,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:26:07,660 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 177 mSDsluCounter, 5208 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6093 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:07,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6093 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-20 06:26:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 628. [2021-11-20 06:26:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 506 states have (on average 1.66798418972332) internal successors, (844), 529 states have internal predecessors, (844), 95 states have call successors, (95), 25 states have call predecessors, (95), 26 states have return successors, (92), 87 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-20 06:26:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1031 transitions. [2021-11-20 06:26:07,693 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1031 transitions. Word has length 93 [2021-11-20 06:26:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:07,693 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1031 transitions. [2021-11-20 06:26:07,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1031 transitions. [2021-11-20 06:26:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:26:07,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:07,696 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:07,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:26:07,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -138861034, now seen corresponding path program 1 times [2021-11-20 06:26:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611317527] [2021-11-20 06:26:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:07,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:26:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:08,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611317527] [2021-11-20 06:26:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611317527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661914524] [2021-11-20 06:26:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:08,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:08,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:08,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:08,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:26:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:08,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661914524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:08,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 06:26:08,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279202585] [2021-11-20 06:26:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:08,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:08,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:08,951 INFO L87 Difference]: Start difference. First operand 628 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:09,123 INFO L93 Difference]: Finished difference Result 1194 states and 1973 transitions. [2021-11-20 06:26:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:09,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-11-20 06:26:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:09,130 INFO L225 Difference]: With dead ends: 1194 [2021-11-20 06:26:09,130 INFO L226 Difference]: Without dead ends: 628 [2021-11-20 06:26:09,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:09,134 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 173 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:09,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2532 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-20 06:26:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2021-11-20 06:26:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 506 states have (on average 1.658102766798419) internal successors, (839), 529 states have internal predecessors, (839), 95 states have call successors, (95), 25 states have call predecessors, (95), 26 states have return successors, (92), 87 states have call predecessors, (92), 90 states have call successors, (92) [2021-11-20 06:26:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1026 transitions. [2021-11-20 06:26:09,168 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1026 transitions. Word has length 93 [2021-11-20 06:26:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:09,169 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 1026 transitions. [2021-11-20 06:26:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1026 transitions. [2021-11-20 06:26:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:26:09,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:09,173 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:09,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:09,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:26:09,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash -895838635, now seen corresponding path program 1 times [2021-11-20 06:26:09,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:09,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855972236] [2021-11-20 06:26:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:09,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:26:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:09,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855972236] [2021-11-20 06:26:09,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855972236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:09,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992591138] [2021-11-20 06:26:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:09,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:09,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:09,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:26:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:26:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:26:10,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:10,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992591138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:10,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:10,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:26:10,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052510248] [2021-11-20 06:26:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:10,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:26:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:26:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:26:10,454 INFO L87 Difference]: Start difference. First operand 628 states and 1026 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:10,588 INFO L93 Difference]: Finished difference Result 1121 states and 1847 transitions. [2021-11-20 06:26:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-20 06:26:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:10,596 INFO L225 Difference]: With dead ends: 1121 [2021-11-20 06:26:10,596 INFO L226 Difference]: Without dead ends: 652 [2021-11-20 06:26:10,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:26:10,601 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 134 mSDsluCounter, 4384 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5281 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:10,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5281 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-20 06:26:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 647. [2021-11-20 06:26:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 522 states have (on average 1.657088122605364) internal successors, (865), 547 states have internal predecessors, (865), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1056 transitions. [2021-11-20 06:26:10,637 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1056 transitions. Word has length 93 [2021-11-20 06:26:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:10,637 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1056 transitions. [2021-11-20 06:26:10,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1056 transitions. [2021-11-20 06:26:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:26:10,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:10,642 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:10,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:10,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:26:10,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1877365016, now seen corresponding path program 1 times [2021-11-20 06:26:10,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106438346] [2021-11-20 06:26:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:26:11,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106438346] [2021-11-20 06:26:11,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106438346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418149121] [2021-11-20 06:26:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:11,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:11,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:26:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:11,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:26:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:26:11,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:11,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418149121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:11,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:11,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-20 06:26:11,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721450552] [2021-11-20 06:26:11,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:26:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:26:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:11,926 INFO L87 Difference]: Start difference. First operand 647 states and 1056 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:12,042 INFO L93 Difference]: Finished difference Result 1151 states and 1898 transitions. [2021-11-20 06:26:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2021-11-20 06:26:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:12,050 INFO L225 Difference]: With dead ends: 1151 [2021-11-20 06:26:12,050 INFO L226 Difference]: Without dead ends: 682 [2021-11-20 06:26:12,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:12,055 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 143 mSDsluCounter, 4374 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5271 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:12,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5271 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-20 06:26:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 647. [2021-11-20 06:26:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 522 states have (on average 1.657088122605364) internal successors, (865), 547 states have internal predecessors, (865), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1056 transitions. [2021-11-20 06:26:12,089 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1056 transitions. Word has length 94 [2021-11-20 06:26:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:12,090 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1056 transitions. [2021-11-20 06:26:12,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1056 transitions. [2021-11-20 06:26:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:26:12,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:12,094 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:12,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:12,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:12,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash -278934120, now seen corresponding path program 1 times [2021-11-20 06:26:12,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:12,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687532910] [2021-11-20 06:26:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:12,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:26:12,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687532910] [2021-11-20 06:26:12,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687532910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905232195] [2021-11-20 06:26:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:12,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:12,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:12,725 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:12,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:26:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:26:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:26:13,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905232195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:13,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-11-20 06:26:13,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72017610] [2021-11-20 06:26:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:13,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:13,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:26:13,259 INFO L87 Difference]: Start difference. First operand 647 states and 1056 transitions. Second operand has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:13,433 INFO L93 Difference]: Finished difference Result 1136 states and 1872 transitions. [2021-11-20 06:26:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2021-11-20 06:26:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:13,441 INFO L225 Difference]: With dead ends: 1136 [2021-11-20 06:26:13,441 INFO L226 Difference]: Without dead ends: 667 [2021-11-20 06:26:13,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:26:13,449 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 177 mSDsluCounter, 5214 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:13,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-20 06:26:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 647. [2021-11-20 06:26:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 522 states have (on average 1.657088122605364) internal successors, (865), 547 states have internal predecessors, (865), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1056 transitions. [2021-11-20 06:26:13,488 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1056 transitions. Word has length 94 [2021-11-20 06:26:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:13,489 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1056 transitions. [2021-11-20 06:26:13,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1056 transitions. [2021-11-20 06:26:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:26:13,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:13,493 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:13,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:13,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:26:13,707 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1670239980, now seen corresponding path program 1 times [2021-11-20 06:26:13,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273685245] [2021-11-20 06:26:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:13,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:26:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:14,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:14,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:26:14,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273685245] [2021-11-20 06:26:14,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273685245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:14,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865007315] [2021-11-20 06:26:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:14,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:14,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:14,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:14,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:26:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:14,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:14,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865007315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:14,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:14,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:26:14,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575198160] [2021-11-20 06:26:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:14,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:14,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:14,618 INFO L87 Difference]: Start difference. First operand 647 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:14,675 INFO L93 Difference]: Finished difference Result 1188 states and 1957 transitions. [2021-11-20 06:26:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-11-20 06:26:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:14,681 INFO L225 Difference]: With dead ends: 1188 [2021-11-20 06:26:14,681 INFO L226 Difference]: Without dead ends: 647 [2021-11-20 06:26:14,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:26:14,686 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 23 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:14,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2674 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-20 06:26:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-20 06:26:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 522 states have (on average 1.6494252873563218) internal successors, (861), 547 states have internal predecessors, (861), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1052 transitions. [2021-11-20 06:26:14,714 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1052 transitions. Word has length 94 [2021-11-20 06:26:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:14,715 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1052 transitions. [2021-11-20 06:26:14,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1052 transitions. [2021-11-20 06:26:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 06:26:14,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:14,718 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:14,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:14,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:26:14,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash -64886323, now seen corresponding path program 1 times [2021-11-20 06:26:14,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:14,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109471419] [2021-11-20 06:26:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:14,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:26:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:26:15,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109471419] [2021-11-20 06:26:15,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109471419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725834631] [2021-11-20 06:26:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:15,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:15,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:15,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:15,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:26:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:26:15,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:26:15,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725834631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:15,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:15,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 06:26:15,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032147485] [2021-11-20 06:26:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:15,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:15,933 INFO L87 Difference]: Start difference. First operand 647 states and 1052 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:16,090 INFO L93 Difference]: Finished difference Result 1136 states and 1869 transitions. [2021-11-20 06:26:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 95 [2021-11-20 06:26:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:16,119 INFO L225 Difference]: With dead ends: 1136 [2021-11-20 06:26:16,119 INFO L226 Difference]: Without dead ends: 667 [2021-11-20 06:26:16,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:26:16,122 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 185 mSDsluCounter, 5176 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6057 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:16,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6057 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-20 06:26:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 647. [2021-11-20 06:26:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 522 states have (on average 1.6494252873563218) internal successors, (861), 547 states have internal predecessors, (861), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1052 transitions. [2021-11-20 06:26:16,149 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1052 transitions. Word has length 95 [2021-11-20 06:26:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1052 transitions. [2021-11-20 06:26:16,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:26:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1052 transitions. [2021-11-20 06:26:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:26:16,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:16,153 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:16,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:16,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:26:16,366 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:16,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -370510403, now seen corresponding path program 1 times [2021-11-20 06:26:16,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:16,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771895163] [2021-11-20 06:26:16,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:16,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:26:16,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:16,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771895163] [2021-11-20 06:26:16,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771895163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:16,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182037335] [2021-11-20 06:26:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:16,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:16,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:16,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:26:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:26:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:26:17,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:17,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182037335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:17,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:17,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-20 06:26:17,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731978759] [2021-11-20 06:26:17,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:17,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:17,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:26:17,253 INFO L87 Difference]: Start difference. First operand 647 states and 1052 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:17,318 INFO L93 Difference]: Finished difference Result 1244 states and 2039 transitions. [2021-11-20 06:26:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2021-11-20 06:26:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:17,325 INFO L225 Difference]: With dead ends: 1244 [2021-11-20 06:26:17,325 INFO L226 Difference]: Without dead ends: 683 [2021-11-20 06:26:17,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:26:17,329 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 38 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:17,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2650 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-20 06:26:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 671. [2021-11-20 06:26:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 546 states have (on average 1.6282051282051282) internal successors, (889), 571 states have internal predecessors, (889), 96 states have call successors, (96), 25 states have call predecessors, (96), 28 states have return successors, (95), 88 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-20 06:26:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1080 transitions. [2021-11-20 06:26:17,361 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1080 transitions. Word has length 96 [2021-11-20 06:26:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:17,362 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1080 transitions. [2021-11-20 06:26:17,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1080 transitions. [2021-11-20 06:26:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 06:26:17,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:17,365 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:17,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:26:17,581 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1622446553, now seen corresponding path program 1 times [2021-11-20 06:26:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:17,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324646694] [2021-11-20 06:26:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:17,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:18,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324646694] [2021-11-20 06:26:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324646694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628662541] [2021-11-20 06:26:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:18,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:18,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:18,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:26:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1730 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:26:18,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:26:18,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:18,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628662541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:18,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:18,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-20 06:26:18,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918043111] [2021-11-20 06:26:18,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:26:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:26:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:26:18,983 INFO L87 Difference]: Start difference. First operand 671 states and 1080 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:21,268 INFO L93 Difference]: Finished difference Result 1733 states and 2875 transitions. [2021-11-20 06:26:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2021-11-20 06:26:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:21,281 INFO L225 Difference]: With dead ends: 1733 [2021-11-20 06:26:21,281 INFO L226 Difference]: Without dead ends: 1269 [2021-11-20 06:26:21,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:26:21,285 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 2192 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:21,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 1644 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:26:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-20 06:26:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1153. [2021-11-20 06:26:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 929 states have (on average 1.6566200215285254) internal successors, (1539), 963 states have internal predecessors, (1539), 179 states have call successors, (179), 39 states have call predecessors, (179), 44 states have return successors, (185), 163 states have call predecessors, (185), 174 states have call successors, (185) [2021-11-20 06:26:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1903 transitions. [2021-11-20 06:26:21,367 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1903 transitions. Word has length 96 [2021-11-20 06:26:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:21,367 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1903 transitions. [2021-11-20 06:26:21,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:26:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1903 transitions. [2021-11-20 06:26:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:26:21,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:21,376 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:21,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:21,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:21,589 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1145672278, now seen corresponding path program 1 times [2021-11-20 06:26:21,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:21,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24931460] [2021-11-20 06:26:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:21,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:26:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:26:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:26:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:22,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24931460] [2021-11-20 06:26:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24931460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:22,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410199204] [2021-11-20 06:26:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:22,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:22,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:22,169 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:22,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:26:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:26:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:26:22,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:22,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410199204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:22,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:22,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-20 06:26:22,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853780667] [2021-11-20 06:26:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:22,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:22,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:22,835 INFO L87 Difference]: Start difference. First operand 1153 states and 1903 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:26:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:25,898 INFO L93 Difference]: Finished difference Result 2974 states and 4977 transitions. [2021-11-20 06:26:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:26:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 124 [2021-11-20 06:26:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:25,918 INFO L225 Difference]: With dead ends: 2974 [2021-11-20 06:26:25,918 INFO L226 Difference]: Without dead ends: 2026 [2021-11-20 06:26:25,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:26:25,927 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 1687 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 4229 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 2940 SdHoareTripleChecker+Invalid, 4548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 4229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 2940 Invalid, 4548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 4229 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:26:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-11-20 06:26:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1856. [2021-11-20 06:26:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1480 states have (on average 1.6472972972972972) internal successors, (2438), 1524 states have internal predecessors, (2438), 301 states have call successors, (301), 58 states have call predecessors, (301), 74 states have return successors, (337), 284 states have call predecessors, (337), 296 states have call successors, (337) [2021-11-20 06:26:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 3076 transitions. [2021-11-20 06:26:26,058 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 3076 transitions. Word has length 124 [2021-11-20 06:26:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:26,058 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 3076 transitions. [2021-11-20 06:26:26,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:26:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 3076 transitions. [2021-11-20 06:26:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:26:26,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:26,065 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:26,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:26,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:26,285 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1108611874, now seen corresponding path program 1 times [2021-11-20 06:26:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942565927] [2021-11-20 06:26:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:26,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:26:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:26:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:26,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942565927] [2021-11-20 06:26:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942565927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:26,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107776957] [2021-11-20 06:26:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:26,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:26,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:26,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:26:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:26:27,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:26:27,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:27,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107776957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:27,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:27,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-20 06:26:27,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733922751] [2021-11-20 06:26:27,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:27,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:27,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:26:27,347 INFO L87 Difference]: Start difference. First operand 1856 states and 3076 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:26:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:27,570 INFO L93 Difference]: Finished difference Result 3715 states and 6240 transitions. [2021-11-20 06:26:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:27,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-20 06:26:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:27,591 INFO L225 Difference]: With dead ends: 3715 [2021-11-20 06:26:27,591 INFO L226 Difference]: Without dead ends: 2067 [2021-11-20 06:26:27,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:26:27,602 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 139 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:27,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 2757 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-11-20 06:26:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1860. [2021-11-20 06:26:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1484 states have (on average 1.6455525606469004) internal successors, (2442), 1528 states have internal predecessors, (2442), 301 states have call successors, (301), 58 states have call predecessors, (301), 74 states have return successors, (337), 284 states have call predecessors, (337), 296 states have call successors, (337) [2021-11-20 06:26:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 3080 transitions. [2021-11-20 06:26:27,753 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 3080 transitions. Word has length 125 [2021-11-20 06:26:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:27,754 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 3080 transitions. [2021-11-20 06:26:27,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:26:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 3080 transitions. [2021-11-20 06:26:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:26:27,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:27,762 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:27,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:27,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:26:27,978 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 320066416, now seen corresponding path program 1 times [2021-11-20 06:26:27,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423275607] [2021-11-20 06:26:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:27,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:28,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423275607] [2021-11-20 06:26:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423275607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091877061] [2021-11-20 06:26:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:28,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:28,537 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:28,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:26:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:26:28,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:29,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:29,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091877061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:29,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:29,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-20 06:26:29,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718860899] [2021-11-20 06:26:29,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:29,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:26:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:29,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:26:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:26:29,322 INFO L87 Difference]: Start difference. First operand 1860 states and 3080 transitions. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:26:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:32,785 INFO L93 Difference]: Finished difference Result 6007 states and 10256 transitions. [2021-11-20 06:26:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:26:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2021-11-20 06:26:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:32,831 INFO L225 Difference]: With dead ends: 6007 [2021-11-20 06:26:32,831 INFO L226 Difference]: Without dead ends: 4354 [2021-11-20 06:26:32,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:26:32,847 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 3212 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 5122 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3332 SdHoareTripleChecker+Valid, 5012 SdHoareTripleChecker+Invalid, 6000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 5122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:32,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3332 Valid, 5012 Invalid, 6000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 5122 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 06:26:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-11-20 06:26:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4019. [2021-11-20 06:26:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4019 states, 3168 states have (on average 1.6410984848484849) internal successors, (5199), 3259 states have internal predecessors, (5199), 686 states have call successors, (686), 112 states have call predecessors, (686), 164 states have return successors, (890), 674 states have call predecessors, (890), 681 states have call successors, (890) [2021-11-20 06:26:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 6775 transitions. [2021-11-20 06:26:33,137 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 6775 transitions. Word has length 128 [2021-11-20 06:26:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:33,137 INFO L470 AbstractCegarLoop]: Abstraction has 4019 states and 6775 transitions. [2021-11-20 06:26:33,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 5 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:26:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 6775 transitions. [2021-11-20 06:26:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 06:26:33,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:33,151 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:33,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:33,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:33,369 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1950540149, now seen corresponding path program 1 times [2021-11-20 06:26:33,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:33,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633762410] [2021-11-20 06:26:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:33,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:33,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:26:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:26:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:26:34,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633762410] [2021-11-20 06:26:34,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633762410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:34,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985481764] [2021-11-20 06:26:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:34,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:34,061 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:34,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:26:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:26:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:26:34,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:34,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985481764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:34,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:34,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-20 06:26:34,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820969895] [2021-11-20 06:26:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:34,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:26:34,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:26:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:26:34,647 INFO L87 Difference]: Start difference. First operand 4019 states and 6775 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:26:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:35,283 INFO L93 Difference]: Finished difference Result 11225 states and 19415 transitions. [2021-11-20 06:26:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:35,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 129 [2021-11-20 06:26:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:35,352 INFO L225 Difference]: With dead ends: 11225 [2021-11-20 06:26:35,352 INFO L226 Difference]: Without dead ends: 7528 [2021-11-20 06:26:35,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:26:35,381 INFO L933 BasicCegarLoop]: 1396 mSDtfsCounter, 752 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 4910 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:35,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 4910 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:26:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7528 states. [2021-11-20 06:26:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7528 to 7503. [2021-11-20 06:26:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7503 states, 5880 states have (on average 1.631122448979592) internal successors, (9591), 6052 states have internal predecessors, (9591), 1295 states have call successors, (1295), 228 states have call predecessors, (1295), 327 states have return successors, (1910), 1276 states have call predecessors, (1910), 1290 states have call successors, (1910) [2021-11-20 06:26:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7503 states to 7503 states and 12796 transitions. [2021-11-20 06:26:35,965 INFO L78 Accepts]: Start accepts. Automaton has 7503 states and 12796 transitions. Word has length 129 [2021-11-20 06:26:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:35,966 INFO L470 AbstractCegarLoop]: Abstraction has 7503 states and 12796 transitions. [2021-11-20 06:26:35,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:26:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7503 states and 12796 transitions. [2021-11-20 06:26:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:26:35,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:35,993 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:36,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:36,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:36,221 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash 345288400, now seen corresponding path program 1 times [2021-11-20 06:26:36,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575936203] [2021-11-20 06:26:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:36,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:26:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:26:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:36,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:36,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575936203] [2021-11-20 06:26:36,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575936203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:36,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342889254] [2021-11-20 06:26:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:36,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:36,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:36,933 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:26:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:26:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:26:37,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342889254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:37,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:37,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-20 06:26:37,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721294918] [2021-11-20 06:26:37,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:37,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:37,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:37,629 INFO L87 Difference]: Start difference. First operand 7503 states and 12796 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:26:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:38,098 INFO L93 Difference]: Finished difference Result 14862 states and 25394 transitions. [2021-11-20 06:26:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 131 [2021-11-20 06:26:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:38,170 INFO L225 Difference]: With dead ends: 14862 [2021-11-20 06:26:38,170 INFO L226 Difference]: Without dead ends: 7557 [2021-11-20 06:26:38,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:38,206 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 39 mSDsluCounter, 1763 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:38,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2647 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2021-11-20 06:26:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7524. [2021-11-20 06:26:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7524 states, 5900 states have (on average 1.6310169491525424) internal successors, (9623), 6073 states have internal predecessors, (9623), 1295 states have call successors, (1295), 228 states have call predecessors, (1295), 328 states have return successors, (1911), 1276 states have call predecessors, (1911), 1290 states have call successors, (1911) [2021-11-20 06:26:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7524 states to 7524 states and 12829 transitions. [2021-11-20 06:26:38,807 INFO L78 Accepts]: Start accepts. Automaton has 7524 states and 12829 transitions. Word has length 131 [2021-11-20 06:26:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 7524 states and 12829 transitions. [2021-11-20 06:26:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:26:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7524 states and 12829 transitions. [2021-11-20 06:26:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 06:26:38,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:38,828 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:38,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:39,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:26:39,041 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash -346895294, now seen corresponding path program 1 times [2021-11-20 06:26:39,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:39,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43238092] [2021-11-20 06:26:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:39,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:26:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:26:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:39,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:39,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43238092] [2021-11-20 06:26:39,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43238092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:39,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436950674] [2021-11-20 06:26:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:39,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:39,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:39,677 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:39,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:26:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2038 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:26:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:26:40,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:40,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436950674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:40,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:40,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-20 06:26:40,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478085918] [2021-11-20 06:26:40,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:40,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:40,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:40,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:40,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:26:40,263 INFO L87 Difference]: Start difference. First operand 7524 states and 12829 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:26:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:40,757 INFO L93 Difference]: Finished difference Result 14792 states and 25274 transitions. [2021-11-20 06:26:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:26:40,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 132 [2021-11-20 06:26:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:40,808 INFO L225 Difference]: With dead ends: 14792 [2021-11-20 06:26:40,808 INFO L226 Difference]: Without dead ends: 7597 [2021-11-20 06:26:40,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:26:40,844 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 175 mSDsluCounter, 5186 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6067 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:40,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6067 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-11-20 06:26:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 7524. [2021-11-20 06:26:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7524 states, 5900 states have (on average 1.6308474576271186) internal successors, (9622), 6073 states have internal predecessors, (9622), 1295 states have call successors, (1295), 228 states have call predecessors, (1295), 328 states have return successors, (1911), 1276 states have call predecessors, (1911), 1290 states have call successors, (1911) [2021-11-20 06:26:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7524 states to 7524 states and 12828 transitions. [2021-11-20 06:26:41,379 INFO L78 Accepts]: Start accepts. Automaton has 7524 states and 12828 transitions. Word has length 132 [2021-11-20 06:26:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 7524 states and 12828 transitions. [2021-11-20 06:26:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:26:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7524 states and 12828 transitions. [2021-11-20 06:26:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 06:26:41,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:41,400 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:41,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:26:41,613 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1788411904, now seen corresponding path program 1 times [2021-11-20 06:26:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817031504] [2021-11-20 06:26:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:26:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:26:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:42,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817031504] [2021-11-20 06:26:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817031504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762252972] [2021-11-20 06:26:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:42,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:42,281 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:42,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:26:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:26:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:26:42,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:42,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762252972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:42,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:42,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 14 [2021-11-20 06:26:42,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330659225] [2021-11-20 06:26:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:42,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:26:42,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:26:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:42,961 INFO L87 Difference]: Start difference. First operand 7524 states and 12828 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 06:26:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:43,676 INFO L93 Difference]: Finished difference Result 8065 states and 13851 transitions. [2021-11-20 06:26:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 132 [2021-11-20 06:26:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:43,747 INFO L225 Difference]: With dead ends: 8065 [2021-11-20 06:26:43,747 INFO L226 Difference]: Without dead ends: 8048 [2021-11-20 06:26:43,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:43,756 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 913 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:43,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [921 Valid, 1616 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:26:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8048 states. [2021-11-20 06:26:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8048 to 7572. [2021-11-20 06:26:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7572 states, 5948 states have (on average 1.6257565568258239) internal successors, (9670), 6121 states have internal predecessors, (9670), 1295 states have call successors, (1295), 228 states have call predecessors, (1295), 328 states have return successors, (1911), 1276 states have call predecessors, (1911), 1290 states have call successors, (1911) [2021-11-20 06:26:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 12876 transitions. [2021-11-20 06:26:44,320 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 12876 transitions. Word has length 132 [2021-11-20 06:26:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:44,320 INFO L470 AbstractCegarLoop]: Abstraction has 7572 states and 12876 transitions. [2021-11-20 06:26:44,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 06:26:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 12876 transitions. [2021-11-20 06:26:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:26:44,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:44,341 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:44,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:44,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:26:44,569 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash 405992699, now seen corresponding path program 1 times [2021-11-20 06:26:44,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:44,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060342594] [2021-11-20 06:26:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:44,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:26:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:44,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:26:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:26:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:26:45,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060342594] [2021-11-20 06:26:45,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060342594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478759846] [2021-11-20 06:26:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:45,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:45,267 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:45,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:26:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:26:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:26:45,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:45,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478759846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:45,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:45,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-11-20 06:26:45,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251251977] [2021-11-20 06:26:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:45,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:26:45,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:26:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:26:45,943 INFO L87 Difference]: Start difference. First operand 7572 states and 12876 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:26:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:46,526 INFO L93 Difference]: Finished difference Result 8430 states and 14250 transitions. [2021-11-20 06:26:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:26:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 138 [2021-11-20 06:26:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:46,588 INFO L225 Difference]: With dead ends: 8430 [2021-11-20 06:26:46,588 INFO L226 Difference]: Without dead ends: 8413 [2021-11-20 06:26:46,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:26:46,598 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 891 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:46,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 3591 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:26:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8413 states. [2021-11-20 06:26:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8413 to 8188. [2021-11-20 06:26:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 6432 states have (on average 1.6128731343283582) internal successors, (10374), 6605 states have internal predecessors, (10374), 1387 states have call successors, (1387), 268 states have call predecessors, (1387), 368 states have return successors, (2135), 1368 states have call predecessors, (2135), 1382 states have call successors, (2135) [2021-11-20 06:26:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 13896 transitions. [2021-11-20 06:26:47,184 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 13896 transitions. Word has length 138 [2021-11-20 06:26:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:47,185 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 13896 transitions. [2021-11-20 06:26:47,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-20 06:26:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 13896 transitions. [2021-11-20 06:26:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:26:47,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:47,214 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:47,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:47,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:26:47,433 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1582215139, now seen corresponding path program 1 times [2021-11-20 06:26:47,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:47,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042210477] [2021-11-20 06:26:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:47,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:26:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:26:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:26:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:26:48,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:48,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042210477] [2021-11-20 06:26:48,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042210477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:48,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272281586] [2021-11-20 06:26:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:48,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:48,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:48,141 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:48,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:26:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:26:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:26:48,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272281586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:48,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 13 [2021-11-20 06:26:48,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192866206] [2021-11-20 06:26:48,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:26:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:26:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:48,766 INFO L87 Difference]: Start difference. First operand 8188 states and 13896 transitions. Second operand has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:26:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:49,328 INFO L93 Difference]: Finished difference Result 16234 states and 27588 transitions. [2021-11-20 06:26:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 149 [2021-11-20 06:26:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:49,377 INFO L225 Difference]: With dead ends: 16234 [2021-11-20 06:26:49,378 INFO L226 Difference]: Without dead ends: 8271 [2021-11-20 06:26:49,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:49,418 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 167 mSDsluCounter, 4336 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 5228 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:49,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 5228 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2021-11-20 06:26:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 8188. [2021-11-20 06:26:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 6432 states have (on average 1.6128731343283582) internal successors, (10374), 6605 states have internal predecessors, (10374), 1387 states have call successors, (1387), 268 states have call predecessors, (1387), 368 states have return successors, (2135), 1368 states have call predecessors, (2135), 1382 states have call successors, (2135) [2021-11-20 06:26:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 13896 transitions. [2021-11-20 06:26:49,944 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 13896 transitions. Word has length 149 [2021-11-20 06:26:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:49,945 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 13896 transitions. [2021-11-20 06:26:49,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:26:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 13896 transitions. [2021-11-20 06:26:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 06:26:49,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:49,973 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:50,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:50,193 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 584121334, now seen corresponding path program 1 times [2021-11-20 06:26:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:50,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64060549] [2021-11-20 06:26:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:50,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:26:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:26:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:26:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:26:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:26:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:26:50,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64060549] [2021-11-20 06:26:50,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64060549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945707234] [2021-11-20 06:26:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:50,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:50,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:50,779 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:50,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:26:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:26:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:26:51,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:51,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945707234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:51,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:51,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 8 [2021-11-20 06:26:51,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378223192] [2021-11-20 06:26:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:51,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:51,711 INFO L87 Difference]: Start difference. First operand 8188 states and 13896 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:26:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:52,297 INFO L93 Difference]: Finished difference Result 16238 states and 27594 transitions. [2021-11-20 06:26:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:52,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 149 [2021-11-20 06:26:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:52,369 INFO L225 Difference]: With dead ends: 16238 [2021-11-20 06:26:52,369 INFO L226 Difference]: Without dead ends: 8018 [2021-11-20 06:26:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:26:52,424 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 11 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:52,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2676 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:26:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8018 states. [2021-11-20 06:26:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8018 to 8018. [2021-11-20 06:26:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8018 states, 6277 states have (on average 1.614306197227975) internal successors, (10133), 6444 states have internal predecessors, (10133), 1382 states have call successors, (1382), 265 states have call predecessors, (1382), 358 states have return successors, (2121), 1362 states have call predecessors, (2121), 1377 states have call successors, (2121) [2021-11-20 06:26:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8018 states to 8018 states and 13636 transitions. [2021-11-20 06:26:53,048 INFO L78 Accepts]: Start accepts. Automaton has 8018 states and 13636 transitions. Word has length 149 [2021-11-20 06:26:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:53,049 INFO L470 AbstractCegarLoop]: Abstraction has 8018 states and 13636 transitions. [2021-11-20 06:26:53,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:26:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8018 states and 13636 transitions. [2021-11-20 06:26:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 06:26:53,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:53,066 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:53,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:53,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:26:53,281 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:53,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1377800840, now seen corresponding path program 1 times [2021-11-20 06:26:53,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:53,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377564704] [2021-11-20 06:26:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:53,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:26:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:26:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:53,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:54,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:54,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:26:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:26:54,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377564704] [2021-11-20 06:26:54,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377564704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561581194] [2021-11-20 06:26:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:54,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:54,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:54,024 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:54,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:26:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:26:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:26:54,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:26:54,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561581194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:54,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:54,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-20 06:26:54,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157132138] [2021-11-20 06:26:54,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:54,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:54,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:54,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:26:54,627 INFO L87 Difference]: Start difference. First operand 8018 states and 13636 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:26:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:55,056 INFO L93 Difference]: Finished difference Result 16005 states and 27238 transitions. [2021-11-20 06:26:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2021-11-20 06:26:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:55,092 INFO L225 Difference]: With dead ends: 16005 [2021-11-20 06:26:55,092 INFO L226 Difference]: Without dead ends: 8018 [2021-11-20 06:26:55,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:55,122 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 176 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:55,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2509 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:26:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8018 states. [2021-11-20 06:26:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8018 to 8018. [2021-11-20 06:26:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8018 states, 6277 states have (on average 1.614146885454835) internal successors, (10132), 6444 states have internal predecessors, (10132), 1382 states have call successors, (1382), 265 states have call predecessors, (1382), 358 states have return successors, (2121), 1362 states have call predecessors, (2121), 1377 states have call successors, (2121) [2021-11-20 06:26:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8018 states to 8018 states and 13635 transitions. [2021-11-20 06:26:55,510 INFO L78 Accepts]: Start accepts. Automaton has 8018 states and 13635 transitions. Word has length 151 [2021-11-20 06:26:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:55,511 INFO L470 AbstractCegarLoop]: Abstraction has 8018 states and 13635 transitions. [2021-11-20 06:26:55,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:26:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8018 states and 13635 transitions. [2021-11-20 06:26:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:26:55,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:55,527 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:26:55,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:55,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:55,741 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2041329410, now seen corresponding path program 1 times [2021-11-20 06:26:55,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264426843] [2021-11-20 06:26:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:55,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:26:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:26:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:26:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:26:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:26:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:26:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:26:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:26:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:26:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:26:56,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264426843] [2021-11-20 06:26:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264426843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:56,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:26:56,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004008243] [2021-11-20 06:26:56,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:26:56,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:26:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:26:56,491 INFO L87 Difference]: Start difference. First operand 8018 states and 13635 transitions. Second operand has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:27:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:08,871 INFO L93 Difference]: Finished difference Result 19344 states and 34577 transitions. [2021-11-20 06:27:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:27:08,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 152 [2021-11-20 06:27:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:08,931 INFO L225 Difference]: With dead ends: 19344 [2021-11-20 06:27:08,931 INFO L226 Difference]: Without dead ends: 11372 [2021-11-20 06:27:08,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:27:08,973 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 2025 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 8443 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 4731 SdHoareTripleChecker+Invalid, 9075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 8443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:08,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2098 Valid, 4731 Invalid, 9075 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [632 Valid, 8443 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2021-11-20 06:27:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11372 states. [2021-11-20 06:27:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11372 to 8102. [2021-11-20 06:27:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8102 states, 6345 states have (on average 1.607565011820331) internal successors, (10200), 6504 states have internal predecessors, (10200), 1382 states have call successors, (1382), 265 states have call predecessors, (1382), 374 states have return successors, (2193), 1386 states have call predecessors, (2193), 1377 states have call successors, (2193) [2021-11-20 06:27:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8102 states to 8102 states and 13775 transitions. [2021-11-20 06:27:10,122 INFO L78 Accepts]: Start accepts. Automaton has 8102 states and 13775 transitions. Word has length 152 [2021-11-20 06:27:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:10,122 INFO L470 AbstractCegarLoop]: Abstraction has 8102 states and 13775 transitions. [2021-11-20 06:27:10,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-20 06:27:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8102 states and 13775 transitions. [2021-11-20 06:27:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:27:10,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:10,137 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:27:10,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 06:27:10,138 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1656998355, now seen corresponding path program 1 times [2021-11-20 06:27:10,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:10,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626146434] [2021-11-20 06:27:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:27:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:27:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:27:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:27:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:27:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:27:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:27:10,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626146434] [2021-11-20 06:27:10,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626146434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:10,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:10,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:27:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066751452] [2021-11-20 06:27:10,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:10,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:10,795 INFO L87 Difference]: Start difference. First operand 8102 states and 13775 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:27:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:18,280 INFO L93 Difference]: Finished difference Result 13206 states and 22735 transitions. [2021-11-20 06:27:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:27:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 156 [2021-11-20 06:27:18,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:18,315 INFO L225 Difference]: With dead ends: 13206 [2021-11-20 06:27:18,316 INFO L226 Difference]: Without dead ends: 5100 [2021-11-20 06:27:18,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:27:18,352 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 1442 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 3625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:18,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 2340 Invalid, 3625 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [424 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 06:27:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-11-20 06:27:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 3611. [2021-11-20 06:27:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 2852 states have (on average 1.6125525946704067) internal successors, (4599), 2923 states have internal predecessors, (4599), 589 states have call successors, (589), 136 states have call predecessors, (589), 169 states have return successors, (831), 573 states have call predecessors, (831), 584 states have call successors, (831) [2021-11-20 06:27:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 6019 transitions. [2021-11-20 06:27:18,931 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 6019 transitions. Word has length 156 [2021-11-20 06:27:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:18,932 INFO L470 AbstractCegarLoop]: Abstraction has 3611 states and 6019 transitions. [2021-11-20 06:27:18,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:27:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 6019 transitions. [2021-11-20 06:27:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 06:27:18,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:18,939 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:27:18,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-20 06:27:18,940 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1944909205, now seen corresponding path program 1 times [2021-11-20 06:27:18,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:18,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541313394] [2021-11-20 06:27:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:18,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:27:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:27:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:27:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:27:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:27:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:27:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:27:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:27:19,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541313394] [2021-11-20 06:27:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541313394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862681868] [2021-11-20 06:27:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:19,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:19,557 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:19,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:27:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:27:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:27:20,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:20,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862681868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:20,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:20,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 11 [2021-11-20 06:27:20,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055039163] [2021-11-20 06:27:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:20,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:20,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:20,189 INFO L87 Difference]: Start difference. First operand 3611 states and 6019 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:27:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:21,093 INFO L93 Difference]: Finished difference Result 9662 states and 16397 transitions. [2021-11-20 06:27:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 157 [2021-11-20 06:27:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:21,136 INFO L225 Difference]: With dead ends: 9662 [2021-11-20 06:27:21,136 INFO L226 Difference]: Without dead ends: 6161 [2021-11-20 06:27:21,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:21,156 INFO L933 BasicCegarLoop]: 1031 mSDtfsCounter, 818 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:21,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1733 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-11-20 06:27:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 6146. [2021-11-20 06:27:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 4816 states have (on average 1.5942691029900333) internal successors, (7678), 4941 states have internal predecessors, (7678), 1036 states have call successors, (1036), 246 states have call predecessors, (1036), 293 states have return successors, (1525), 1002 states have call predecessors, (1525), 1031 states have call successors, (1525) [2021-11-20 06:27:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 10239 transitions. [2021-11-20 06:27:22,064 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 10239 transitions. Word has length 157 [2021-11-20 06:27:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:22,065 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 10239 transitions. [2021-11-20 06:27:22,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 06:27:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 10239 transitions. [2021-11-20 06:27:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:27:22,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:22,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:22,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:22,276 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1871061561, now seen corresponding path program 1 times [2021-11-20 06:27:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774492466] [2021-11-20 06:27:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:27:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:27:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:27:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:27:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:27:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:27:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:27:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:27:22,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774492466] [2021-11-20 06:27:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774492466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107667717] [2021-11-20 06:27:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:22,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:22,974 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:22,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:27:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 2128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:27:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:27:23,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:23,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107667717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:23,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:23,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-11-20 06:27:23,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981770618] [2021-11-20 06:27:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:23,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:23,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:23,695 INFO L87 Difference]: Start difference. First operand 6146 states and 10239 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:27:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:25,046 INFO L93 Difference]: Finished difference Result 17167 states and 29131 transitions. [2021-11-20 06:27:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 162 [2021-11-20 06:27:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:25,100 INFO L225 Difference]: With dead ends: 17167 [2021-11-20 06:27:25,100 INFO L226 Difference]: Without dead ends: 11163 [2021-11-20 06:27:25,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:25,126 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 879 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:25,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1583 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11163 states. [2021-11-20 06:27:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11163 to 11136. [2021-11-20 06:27:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11136 states, 8686 states have (on average 1.5945199171079898) internal successors, (13850), 8926 states have internal predecessors, (13850), 1908 states have call successors, (1908), 468 states have call predecessors, (1908), 541 states have return successors, (3013), 1829 states have call predecessors, (3013), 1903 states have call successors, (3013) [2021-11-20 06:27:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11136 states to 11136 states and 18771 transitions. [2021-11-20 06:27:26,549 INFO L78 Accepts]: Start accepts. Automaton has 11136 states and 18771 transitions. Word has length 162 [2021-11-20 06:27:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 11136 states and 18771 transitions. [2021-11-20 06:27:26,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:27:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11136 states and 18771 transitions. [2021-11-20 06:27:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 06:27:26,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:26,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:26,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:26,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:26,769 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1727846915, now seen corresponding path program 1 times [2021-11-20 06:27:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:26,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469177727] [2021-11-20 06:27:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:26,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:27:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:27:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:27:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:27:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:27:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:27:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:27:27,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469177727] [2021-11-20 06:27:27,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469177727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:27,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:27,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:27:27,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743871586] [2021-11-20 06:27:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:27:27,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:27:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:27:27,543 INFO L87 Difference]: Start difference. First operand 11136 states and 18771 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 10 states have internal predecessors, (117), 4 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:44,066 INFO L93 Difference]: Finished difference Result 27109 states and 48263 transitions. [2021-11-20 06:27:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:27:44,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 10 states have internal predecessors, (117), 4 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 165 [2021-11-20 06:27:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:44,163 INFO L225 Difference]: With dead ends: 27109 [2021-11-20 06:27:44,163 INFO L226 Difference]: Without dead ends: 16989 [2021-11-20 06:27:44,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:27:44,219 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 2628 mSDsluCounter, 4549 mSDsCounter, 0 mSdLazyCounter, 11494 mSolverCounterSat, 812 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2652 SdHoareTripleChecker+Valid, 5681 SdHoareTripleChecker+Invalid, 12306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 812 IncrementalHoareTripleChecker+Valid, 11494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:44,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2652 Valid, 5681 Invalid, 12306 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [812 Valid, 11494 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-11-20 06:27:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16989 states. [2021-11-20 06:27:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16989 to 13072. [2021-11-20 06:27:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13072 states, 10212 states have (on average 1.572072072072072) internal successors, (16054), 10458 states have internal predecessors, (16054), 2198 states have call successors, (2198), 586 states have call predecessors, (2198), 661 states have return successors, (3542), 2115 states have call predecessors, (3542), 2193 states have call successors, (3542) [2021-11-20 06:27:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13072 states to 13072 states and 21794 transitions. [2021-11-20 06:27:46,229 INFO L78 Accepts]: Start accepts. Automaton has 13072 states and 21794 transitions. Word has length 165 [2021-11-20 06:27:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:46,230 INFO L470 AbstractCegarLoop]: Abstraction has 13072 states and 21794 transitions. [2021-11-20 06:27:46,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 10 states have internal predecessors, (117), 4 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 06:27:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 13072 states and 21794 transitions. [2021-11-20 06:27:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 06:27:46,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:46,236 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:27:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-20 06:27:46,236 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1141041032, now seen corresponding path program 1 times [2021-11-20 06:27:46,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:46,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383811504] [2021-11-20 06:27:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:46,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:27:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:27:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:27:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:27:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:27:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:27:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:27:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:27:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:27:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:27:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:27:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:27:46,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:46,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383811504] [2021-11-20 06:27:46,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383811504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:46,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:46,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:27:46,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761653867] [2021-11-20 06:27:46,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:27:46,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:27:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:27:46,959 INFO L87 Difference]: Start difference. First operand 13072 states and 21794 transitions. Second operand has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 7 states have internal predecessors, (117), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:28:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:05,211 INFO L93 Difference]: Finished difference Result 35069 states and 63483 transitions. [2021-11-20 06:28:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:28:05,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 7 states have internal predecessors, (117), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 167 [2021-11-20 06:28:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:05,568 INFO L225 Difference]: With dead ends: 35069 [2021-11-20 06:28:05,568 INFO L226 Difference]: Without dead ends: 23811 [2021-11-20 06:28:05,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:28:05,641 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 3711 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 7731 mSolverCounterSat, 1350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3774 SdHoareTripleChecker+Valid, 3655 SdHoareTripleChecker+Invalid, 9081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1350 IncrementalHoareTripleChecker+Valid, 7731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:05,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3774 Valid, 3655 Invalid, 9081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1350 Valid, 7731 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2021-11-20 06:28:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23811 states. [2021-11-20 06:28:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23811 to 18033. [2021-11-20 06:28:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18033 states, 14064 states have (on average 1.5549630261660978) internal successors, (21869), 14465 states have internal predecessors, (21869), 2941 states have call successors, (2941), 802 states have call predecessors, (2941), 1027 states have return successors, (5393), 2875 states have call predecessors, (5393), 2936 states have call successors, (5393) [2021-11-20 06:28:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18033 states to 18033 states and 30203 transitions. [2021-11-20 06:28:08,876 INFO L78 Accepts]: Start accepts. Automaton has 18033 states and 30203 transitions. Word has length 167 [2021-11-20 06:28:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 18033 states and 30203 transitions. [2021-11-20 06:28:08,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 7 states have internal predecessors, (117), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:28:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 18033 states and 30203 transitions. [2021-11-20 06:28:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 06:28:08,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:08,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:08,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 06:28:08,882 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash 958042173, now seen corresponding path program 1 times [2021-11-20 06:28:08,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381200042] [2021-11-20 06:28:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:08,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:28:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:28:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:28:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:28:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:28:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:28:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 06:28:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:28:09,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381200042] [2021-11-20 06:28:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381200042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:09,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215347931] [2021-11-20 06:28:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:09,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:09,726 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:09,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:28:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:28:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:28:10,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:28:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215347931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:10,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:28:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2021-11-20 06:28:10,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899061953] [2021-11-20 06:28:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:10,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:28:10,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:28:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:28:10,544 INFO L87 Difference]: Start difference. First operand 18033 states and 30203 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:28:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:13,079 INFO L93 Difference]: Finished difference Result 36292 states and 62653 transitions. [2021-11-20 06:28:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:28:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 169 [2021-11-20 06:28:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:13,165 INFO L225 Difference]: With dead ends: 36292 [2021-11-20 06:28:13,165 INFO L226 Difference]: Without dead ends: 18277 [2021-11-20 06:28:13,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:28:13,256 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 22 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:13,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2521 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18277 states. [2021-11-20 06:28:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18277 to 18277. [2021-11-20 06:28:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18277 states, 14264 states have (on average 1.536665731912507) internal successors, (21919), 14683 states have internal predecessors, (21919), 2941 states have call successors, (2941), 828 states have call predecessors, (2941), 1071 states have return successors, (5437), 2875 states have call predecessors, (5437), 2936 states have call successors, (5437) [2021-11-20 06:28:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18277 states to 18277 states and 30297 transitions. [2021-11-20 06:28:16,223 INFO L78 Accepts]: Start accepts. Automaton has 18277 states and 30297 transitions. Word has length 169 [2021-11-20 06:28:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:16,224 INFO L470 AbstractCegarLoop]: Abstraction has 18277 states and 30297 transitions. [2021-11-20 06:28:16,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:28:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18277 states and 30297 transitions. [2021-11-20 06:28:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 06:28:16,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:16,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:16,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:16,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_430ecd32-3601-4b4e-9393-25bbe79897f1/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:28:16,430 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:16,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1870094948, now seen corresponding path program 1 times [2021-11-20 06:28:16,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:16,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475430730] [2021-11-20 06:28:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:16,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:28:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:28:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:28:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:28:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:28:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:28:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:28:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 06:28:17,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:17,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475430730] [2021-11-20 06:28:17,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475430730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:17,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:17,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:28:17,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136475149] [2021-11-20 06:28:17,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:17,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:28:17,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:17,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:28:17,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:28:17,080 INFO L87 Difference]: Start difference. First operand 18277 states and 30297 transitions. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:28:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:34,813 INFO L93 Difference]: Finished difference Result 42258 states and 73780 transitions. [2021-11-20 06:28:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:28:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 170 [2021-11-20 06:28:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:34,974 INFO L225 Difference]: With dead ends: 42258 [2021-11-20 06:28:34,974 INFO L226 Difference]: Without dead ends: 25799 [2021-11-20 06:28:35,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:28:35,212 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 4486 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 6770 mSolverCounterSat, 1521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4547 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 8291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1521 IncrementalHoareTripleChecker+Valid, 6770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:35,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4547 Valid, 3090 Invalid, 8291 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1521 Valid, 6770 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2021-11-20 06:28:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25799 states. [2021-11-20 06:28:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25799 to 20509. [2021-11-20 06:28:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20509 states, 16056 states have (on average 1.5153836571998007) internal successors, (24331), 16479 states have internal predecessors, (24331), 3207 states have call successors, (3207), 1022 states have call predecessors, (3207), 1245 states have return successors, (5851), 3117 states have call predecessors, (5851), 3202 states have call successors, (5851) [2021-11-20 06:28:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20509 states to 20509 states and 33389 transitions. [2021-11-20 06:28:38,305 INFO L78 Accepts]: Start accepts. Automaton has 20509 states and 33389 transitions. Word has length 170 [2021-11-20 06:28:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:38,306 INFO L470 AbstractCegarLoop]: Abstraction has 20509 states and 33389 transitions. [2021-11-20 06:28:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 7 states have internal predecessors, (118), 4 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:28:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20509 states and 33389 transitions. [2021-11-20 06:28:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:28:38,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:38,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:38,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 06:28:38,312 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -998041125, now seen corresponding path program 1 times [2021-11-20 06:28:38,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201386999] [2021-11-20 06:28:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:28:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:28:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:28:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:28:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:28:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:28:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:28:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:28:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:28:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:28:39,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201386999] [2021-11-20 06:28:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201386999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:39,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:39,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:28:39,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288776425] [2021-11-20 06:28:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:39,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:28:39,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:28:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:28:39,265 INFO L87 Difference]: Start difference. First operand 20509 states and 33389 transitions. Second operand has 14 states, 14 states have (on average 8.5) internal successors, (119), 8 states have internal predecessors, (119), 4 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 06:28:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:55,813 INFO L93 Difference]: Finished difference Result 47454 states and 81004 transitions. [2021-11-20 06:28:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:28:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 8 states have internal predecessors, (119), 4 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 3 states have call successors, (19) Word has length 177 [2021-11-20 06:28:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:56,132 INFO L225 Difference]: With dead ends: 47454 [2021-11-20 06:28:56,132 INFO L226 Difference]: Without dead ends: 27063 [2021-11-20 06:28:56,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:28:56,212 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 2977 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 7937 mSolverCounterSat, 1465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 9402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1465 IncrementalHoareTripleChecker+Valid, 7937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:56,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2977 Valid, 2766 Invalid, 9402 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1465 Valid, 7937 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-11-20 06:28:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27063 states. [2021-11-20 06:28:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27063 to 20633. [2021-11-20 06:28:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20633 states, 16136 states have (on average 1.503036688150719) internal successors, (24253), 16585 states have internal predecessors, (24253), 3207 states have call successors, (3207), 1022 states have call predecessors, (3207), 1289 states have return successors, (6119), 3135 states have call predecessors, (6119), 3202 states have call successors, (6119) [2021-11-20 06:28:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20633 states to 20633 states and 33579 transitions. [2021-11-20 06:28:59,590 INFO L78 Accepts]: Start accepts. Automaton has 20633 states and 33579 transitions. Word has length 177 [2021-11-20 06:28:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 20633 states and 33579 transitions. [2021-11-20 06:28:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.5) internal successors, (119), 8 states have internal predecessors, (119), 4 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 7 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 06:28:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20633 states and 33579 transitions. [2021-11-20 06:28:59,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 06:28:59,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:59,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:59,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-20 06:28:59,596 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -956827041, now seen corresponding path program 1 times [2021-11-20 06:28:59,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894805773] [2021-11-20 06:28:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:59,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:28:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:28:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:28:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:28:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:29:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:29:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:29:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:29:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:29:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:29:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:29:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:29:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:29:00,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:00,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894805773] [2021-11-20 06:29:00,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894805773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:00,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:00,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:29:00,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754891972] [2021-11-20 06:29:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:00,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:29:00,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:29:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:00,373 INFO L87 Difference]: Start difference. First operand 20633 states and 33579 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 06:29:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:26,872 INFO L93 Difference]: Finished difference Result 70081 states and 126819 transitions. [2021-11-20 06:29:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:29:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 178 [2021-11-20 06:29:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:27,434 INFO L225 Difference]: With dead ends: 70081 [2021-11-20 06:29:27,434 INFO L226 Difference]: Without dead ends: 49610 [2021-11-20 06:29:27,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:29:27,562 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 4344 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 6237 mSolverCounterSat, 1965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4406 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 8202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1965 IncrementalHoareTripleChecker+Valid, 6237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:27,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4406 Valid, 2683 Invalid, 8202 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1965 Valid, 6237 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2021-11-20 06:29:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49610 states. [2021-11-20 06:29:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49610 to 35696. [2021-11-20 06:29:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35696 states, 27449 states have (on average 1.4953550220408758) internal successors, (41046), 28414 states have internal predecessors, (41046), 6027 states have call successors, (6027), 1671 states have call predecessors, (6027), 2219 states have return successors, (12020), 5990 states have call predecessors, (12020), 6022 states have call successors, (12020) [2021-11-20 06:29:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35696 states to 35696 states and 59093 transitions. [2021-11-20 06:29:34,248 INFO L78 Accepts]: Start accepts. Automaton has 35696 states and 59093 transitions. Word has length 178 [2021-11-20 06:29:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:34,249 INFO L470 AbstractCegarLoop]: Abstraction has 35696 states and 59093 transitions. [2021-11-20 06:29:34,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 06:29:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 35696 states and 59093 transitions. [2021-11-20 06:29:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:29:34,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:34,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:34,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-20 06:29:34,259 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1592213109, now seen corresponding path program 1 times [2021-11-20 06:29:34,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:34,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424845610] [2021-11-20 06:29:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:34,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:29:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:29:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:29:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:29:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:29:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:34,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:29:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:29:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:29:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:29:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:29:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:29:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:29:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:29:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 06:29:35,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:35,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424845610] [2021-11-20 06:29:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424845610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:35,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:35,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:29:35,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629478770] [2021-11-20 06:29:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:35,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:29:35,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:29:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:35,181 INFO L87 Difference]: Start difference. First operand 35696 states and 59093 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 5 states have internal predecessors, (124), 5 states have call successors, (21), 6 states have call predecessors, (21), 3 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20)