./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa --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 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:57:31,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:57:31,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:57:31,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:57:31,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:57:31,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:57:31,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:57:31,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:57:31,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:57:31,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:57:31,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:57:31,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:57:31,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:57:31,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:57:31,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:57:31,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:57:31,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:57:31,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:57:31,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:57:31,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:57:31,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:57:31,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:57:31,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:57:31,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:57:31,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:57:31,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:57:31,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:57:31,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:57:31,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:57:31,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:57:31,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:57:31,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:57:31,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:57:31,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:57:31,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:57:31,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:57:31,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:57:31,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:57:31,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:57:31,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:57:31,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:57:31,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:57:31,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:57:31,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:57:31,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:57:31,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:57:31,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:57:31,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:57:31,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:57:31,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:57:31,528 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:57:31,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:57:31,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:57:31,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:57:31,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:57:31,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:57:31,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:57:31,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:57:31,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:57:31,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:57:31,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:57:31,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:57:31,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:57:31,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:57:31,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:57:31,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:57:31,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:57:31,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:57:31,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:57:31,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:57:31,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:57:31,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:57:31,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:57:31,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:57:31,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:57:31,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:57:31,533 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_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21399f6c1c6de0b812a418410b61643449f7872d7a63a6928748a1ba61200764 [2021-12-06 23:57:31,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:57:31,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:57:31,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:57:31,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:57:31,765 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:57:31,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2021-12-06 23:57:31,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/data/9745b52e3/26337339516c445b8b6ffd6f1b49a895/FLAG087cee993 [2021-12-06 23:57:32,513 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:57:32,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c [2021-12-06 23:57:32,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/data/9745b52e3/26337339516c445b8b6ffd6f1b49a895/FLAG087cee993 [2021-12-06 23:57:32,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/data/9745b52e3/26337339516c445b8b6ffd6f1b49a895 [2021-12-06 23:57:32,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:57:32,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:57:32,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:57:32,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:57:32,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:57:32,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:57:32" (1/1) ... [2021-12-06 23:57:32,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6972882c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:32, skipping insertion in model container [2021-12-06 23:57:32,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:57:32" (1/1) ... [2021-12-06 23:57:32,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:57:33,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:57:34,488 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_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2021-12-06 23:57:34,508 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_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2021-12-06 23:57:34,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:57:34,689 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:57:35,497 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_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[382357,382370] [2021-12-06 23:57:35,499 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_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/sv-benchmarks/c/combinations/Problem05_label46+token_ring.05.cil-2.c[383339,383352] [2021-12-06 23:57:35,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:57:35,571 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:57:35,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35 WrapperNode [2021-12-06 23:57:35,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:57:35,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:57:35,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:57:35,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:57:35,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:35,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:35,968 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2021-12-06 23:57:35,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:57:35,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:57:35,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:57:35,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:57:35,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:35,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:57:36,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:57:36,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:57:36,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:57:36,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (1/1) ... [2021-12-06 23:57:36,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:57:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:36,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:57:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:57:36,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:57:36,286 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-06 23:57:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-06 23:57:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 23:57:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 23:57:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-06 23:57:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-06 23:57:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-06 23:57:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-06 23:57:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-06 23:57:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-06 23:57:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-06 23:57:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-06 23:57:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-06 23:57:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-06 23:57:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:57:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:57:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:57:36,380 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:57:36,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:57:40,762 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:57:40,785 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:57:40,785 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-06 23:57:40,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:57:40 BoogieIcfgContainer [2021-12-06 23:57:40,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:57:40,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:57:40,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:57:40,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:57:40,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:57:32" (1/3) ... [2021-12-06 23:57:40,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c37beb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:57:40, skipping insertion in model container [2021-12-06 23:57:40,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:57:35" (2/3) ... [2021-12-06 23:57:40,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c37beb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:57:40, skipping insertion in model container [2021-12-06 23:57:40,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:57:40" (3/3) ... [2021-12-06 23:57:40,795 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.05.cil-2.c [2021-12-06 23:57:40,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:57:40,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 23:57:40,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:57:40,845 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 [2021-12-06 23:57:40,845 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 23:57:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 23:57:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:40,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:40,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:40,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -645844934, now seen corresponding path program 1 times [2021-12-06 23:57:40,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:40,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726752911] [2021-12-06 23:57:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:40,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:41,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726752911] [2021-12-06 23:57:41,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726752911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:41,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:41,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:57:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526826932] [2021-12-06 23:57:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:41,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:57:41,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:57:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:41,257 INFO L87 Difference]: Start difference. First operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:41,920 INFO L93 Difference]: Finished difference Result 4852 states and 8953 transitions. [2021-12-06 23:57:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:57:41,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:41,953 INFO L225 Difference]: With dead ends: 4852 [2021-12-06 23:57:41,953 INFO L226 Difference]: Without dead ends: 2395 [2021-12-06 23:57:41,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:57:41,966 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 521 mSDsluCounter, 12314 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 16687 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:41,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 16687 Invalid, 389 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-06 23:57:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2330. [2021-12-06 23:57:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2301 states have (on average 1.841373315949587) internal successors, (4237), 2304 states have internal predecessors, (4237), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-06 23:57:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 4277 transitions. [2021-12-06 23:57:42,118 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 4277 transitions. Word has length 102 [2021-12-06 23:57:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 4277 transitions. [2021-12-06 23:57:42,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 4277 transitions. [2021-12-06 23:57:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:42,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:42,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:42,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:57:42,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1294737080, now seen corresponding path program 1 times [2021-12-06 23:57:42,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:42,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80915996] [2021-12-06 23:57:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:42,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:42,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80915996] [2021-12-06 23:57:42,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80915996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:42,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:42,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:57:42,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182126534] [2021-12-06 23:57:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:42,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:57:42,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:57:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:57:42,272 INFO L87 Difference]: Start difference. First operand 2330 states and 4277 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:43,348 INFO L93 Difference]: Finished difference Result 2856 states and 5108 transitions. [2021-12-06 23:57:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:57:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:43,368 INFO L225 Difference]: With dead ends: 2856 [2021-12-06 23:57:43,368 INFO L226 Difference]: Without dead ends: 2660 [2021-12-06 23:57:43,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:57:43,372 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4721 mSDsluCounter, 12456 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4733 SdHoareTripleChecker+Valid, 16784 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4733 Valid, 16784 Invalid, 1052 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-12-06 23:57:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2529. [2021-12-06 23:57:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8217022993142395) internal successors, (4516), 2483 states have internal predecessors, (4516), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-06 23:57:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4587 transitions. [2021-12-06 23:57:43,491 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4587 transitions. Word has length 102 [2021-12-06 23:57:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4587 transitions. [2021-12-06 23:57:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4587 transitions. [2021-12-06 23:57:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:43,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:43,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:43,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:57:43,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash -389078092, now seen corresponding path program 1 times [2021-12-06 23:57:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860168047] [2021-12-06 23:57:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:43,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:43,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:43,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860168047] [2021-12-06 23:57:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860168047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:43,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:43,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:43,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203070504] [2021-12-06 23:57:43,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:43,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:43,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:43,614 INFO L87 Difference]: Start difference. First operand 2529 states and 4587 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:44,215 INFO L93 Difference]: Finished difference Result 3061 states and 5432 transitions. [2021-12-06 23:57:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:57:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:44,228 INFO L225 Difference]: With dead ends: 3061 [2021-12-06 23:57:44,228 INFO L226 Difference]: Without dead ends: 2666 [2021-12-06 23:57:44,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:57:44,231 INFO L933 BasicCegarLoop]: 4285 mSDtfsCounter, 4601 mSDsluCounter, 12283 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4614 SdHoareTripleChecker+Valid, 16568 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:44,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4614 Valid, 16568 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-12-06 23:57:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2529. [2021-12-06 23:57:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8208955223880596) internal successors, (4514), 2483 states have internal predecessors, (4514), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-06 23:57:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4585 transitions. [2021-12-06 23:57:44,304 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4585 transitions. Word has length 102 [2021-12-06 23:57:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:44,304 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4585 transitions. [2021-12-06 23:57:44,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4585 transitions. [2021-12-06 23:57:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:44,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:44,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:44,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:57:44,306 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404726, now seen corresponding path program 1 times [2021-12-06 23:57:44,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392359877] [2021-12-06 23:57:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:44,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:44,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:44,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392359877] [2021-12-06 23:57:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392359877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:44,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296262736] [2021-12-06 23:57:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:44,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:44,409 INFO L87 Difference]: Start difference. First operand 2529 states and 4585 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:45,539 INFO L93 Difference]: Finished difference Result 3321 states and 5829 transitions. [2021-12-06 23:57:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:57:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:45,553 INFO L225 Difference]: With dead ends: 3321 [2021-12-06 23:57:45,554 INFO L226 Difference]: Without dead ends: 2926 [2021-12-06 23:57:45,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:57:45,557 INFO L933 BasicCegarLoop]: 4475 mSDtfsCounter, 4718 mSDsluCounter, 16937 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 21412 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:45,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 21412 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-12-06 23:57:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2716. [2021-12-06 23:57:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2645 states have (on average 1.8026465028355387) internal successors, (4768), 2650 states have internal predecessors, (4768), 49 states have call successors, (49), 19 states have call predecessors, (49), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-06 23:57:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 4869 transitions. [2021-12-06 23:57:45,637 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 4869 transitions. Word has length 102 [2021-12-06 23:57:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:45,637 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 4869 transitions. [2021-12-06 23:57:45,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 4869 transitions. [2021-12-06 23:57:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:45,640 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:45,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:45,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:57:45,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1482706376, now seen corresponding path program 1 times [2021-12-06 23:57:45,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:45,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015741862] [2021-12-06 23:57:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:45,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:45,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015741862] [2021-12-06 23:57:45,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015741862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:45,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:45,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:45,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661783251] [2021-12-06 23:57:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:45,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:45,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:45,743 INFO L87 Difference]: Start difference. First operand 2716 states and 4869 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:46,716 INFO L93 Difference]: Finished difference Result 4006 states and 6889 transitions. [2021-12-06 23:57:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:57:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:46,732 INFO L225 Difference]: With dead ends: 4006 [2021-12-06 23:57:46,732 INFO L226 Difference]: Without dead ends: 3424 [2021-12-06 23:57:46,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:57:46,736 INFO L933 BasicCegarLoop]: 4468 mSDtfsCounter, 4714 mSDsluCounter, 16933 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4726 SdHoareTripleChecker+Valid, 21401 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:46,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4726 Valid, 21401 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:57:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-12-06 23:57:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3093. [2021-12-06 23:57:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 2980 states have (on average 1.7721476510067113) internal successors, (5281), 2987 states have internal predecessors, (5281), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-06 23:57:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 5446 transitions. [2021-12-06 23:57:46,812 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 5446 transitions. Word has length 102 [2021-12-06 23:57:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:46,812 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 5446 transitions. [2021-12-06 23:57:46,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 5446 transitions. [2021-12-06 23:57:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:46,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:46,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:46,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:57:46,814 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash 84051574, now seen corresponding path program 1 times [2021-12-06 23:57:46,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133303430] [2021-12-06 23:57:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:46,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:46,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:46,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133303430] [2021-12-06 23:57:46,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133303430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:46,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:46,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:46,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281798546] [2021-12-06 23:57:46,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:46,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:46,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:46,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:46,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:46,892 INFO L87 Difference]: Start difference. First operand 3093 states and 5446 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:47,456 INFO L93 Difference]: Finished difference Result 4371 states and 7455 transitions. [2021-12-06 23:57:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:57:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:47,471 INFO L225 Difference]: With dead ends: 4371 [2021-12-06 23:57:47,471 INFO L226 Difference]: Without dead ends: 3412 [2021-12-06 23:57:47,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:57:47,476 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4598 mSDsluCounter, 12282 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4611 SdHoareTripleChecker+Valid, 16554 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:47,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4611 Valid, 16554 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-12-06 23:57:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3093. [2021-12-06 23:57:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 2980 states have (on average 1.770469798657718) internal successors, (5276), 2987 states have internal predecessors, (5276), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-06 23:57:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 5441 transitions. [2021-12-06 23:57:47,551 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 5441 transitions. Word has length 102 [2021-12-06 23:57:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:47,551 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 5441 transitions. [2021-12-06 23:57:47,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 5441 transitions. [2021-12-06 23:57:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:47,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:47,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:47,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:57:47,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -973786504, now seen corresponding path program 1 times [2021-12-06 23:57:47,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:47,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860734088] [2021-12-06 23:57:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:47,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:47,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860734088] [2021-12-06 23:57:47,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860734088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:47,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:47,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:47,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519137194] [2021-12-06 23:57:47,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:47,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:47,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:47,624 INFO L87 Difference]: Start difference. First operand 3093 states and 5441 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:48,667 INFO L93 Difference]: Finished difference Result 5649 states and 9388 transitions. [2021-12-06 23:57:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:57:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:48,687 INFO L225 Difference]: With dead ends: 5649 [2021-12-06 23:57:48,687 INFO L226 Difference]: Without dead ends: 4690 [2021-12-06 23:57:48,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:57:48,691 INFO L933 BasicCegarLoop]: 4322 mSDtfsCounter, 4966 mSDsluCounter, 16559 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4984 SdHoareTripleChecker+Valid, 20881 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:48,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4984 Valid, 20881 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:57:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-12-06 23:57:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 3843. [2021-12-06 23:57:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3650 states have (on average 1.726027397260274) internal successors, (6300), 3661 states have internal predecessors, (6300), 129 states have call successors, (129), 55 states have call predecessors, (129), 62 states have return successors, (162), 134 states have call predecessors, (162), 127 states have call successors, (162) [2021-12-06 23:57:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 6591 transitions. [2021-12-06 23:57:48,801 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 6591 transitions. Word has length 102 [2021-12-06 23:57:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:48,801 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 6591 transitions. [2021-12-06 23:57:48,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 6591 transitions. [2021-12-06 23:57:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:48,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:48,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:48,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:57:48,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2116288970, now seen corresponding path program 1 times [2021-12-06 23:57:48,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:48,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905941886] [2021-12-06 23:57:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:48,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:48,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905941886] [2021-12-06 23:57:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905941886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:48,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:48,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:48,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432498488] [2021-12-06 23:57:48,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:48,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:48,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:48,885 INFO L87 Difference]: Start difference. First operand 3843 states and 6591 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:50,132 INFO L93 Difference]: Finished difference Result 8501 states and 13780 transitions. [2021-12-06 23:57:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:57:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:50,154 INFO L225 Difference]: With dead ends: 8501 [2021-12-06 23:57:50,154 INFO L226 Difference]: Without dead ends: 6792 [2021-12-06 23:57:50,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:57:50,160 INFO L933 BasicCegarLoop]: 4525 mSDtfsCounter, 4747 mSDsluCounter, 16922 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 21447 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:50,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4758 Valid, 21447 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:57:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2021-12-06 23:57:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 5256. [2021-12-06 23:57:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 4907 states have (on average 1.6714897085795801) internal successors, (8202), 4926 states have internal predecessors, (8202), 229 states have call successors, (229), 103 states have call predecessors, (229), 118 states have return successors, (324), 242 states have call predecessors, (324), 227 states have call successors, (324) [2021-12-06 23:57:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8755 transitions. [2021-12-06 23:57:50,326 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8755 transitions. Word has length 102 [2021-12-06 23:57:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:50,326 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 8755 transitions. [2021-12-06 23:57:50,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8755 transitions. [2021-12-06 23:57:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:50,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:50,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:57:50,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1876049224, now seen corresponding path program 1 times [2021-12-06 23:57:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983817101] [2021-12-06 23:57:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:50,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:50,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983817101] [2021-12-06 23:57:50,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983817101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:50,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:50,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:50,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739060228] [2021-12-06 23:57:50,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:50,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:50,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:50,397 INFO L87 Difference]: Start difference. First operand 5256 states and 8755 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:51,749 INFO L93 Difference]: Finished difference Result 13816 states and 21958 transitions. [2021-12-06 23:57:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:57:51,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:51,771 INFO L225 Difference]: With dead ends: 13816 [2021-12-06 23:57:51,771 INFO L226 Difference]: Without dead ends: 10694 [2021-12-06 23:57:51,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:57:51,780 INFO L933 BasicCegarLoop]: 4445 mSDtfsCounter, 4839 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4857 SdHoareTripleChecker+Valid, 21370 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:51,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4857 Valid, 21370 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:57:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10694 states. [2021-12-06 23:57:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10694 to 8153. [2021-12-06 23:57:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8153 states, 7500 states have (on average 1.6208) internal successors, (12156), 7535 states have internal predecessors, (12156), 421 states have call successors, (421), 199 states have call predecessors, (421), 230 states have return successors, (694), 450 states have call predecessors, (694), 419 states have call successors, (694) [2021-12-06 23:57:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8153 states to 8153 states and 13271 transitions. [2021-12-06 23:57:52,075 INFO L78 Accepts]: Start accepts. Automaton has 8153 states and 13271 transitions. Word has length 102 [2021-12-06 23:57:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:52,075 INFO L470 AbstractCegarLoop]: Abstraction has 8153 states and 13271 transitions. [2021-12-06 23:57:52,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8153 states and 13271 transitions. [2021-12-06 23:57:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:52,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:52,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:52,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:57:52,080 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1037015562, now seen corresponding path program 1 times [2021-12-06 23:57:52,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:52,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774806163] [2021-12-06 23:57:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:52,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:52,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774806163] [2021-12-06 23:57:52,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774806163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:52,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:52,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:52,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468278571] [2021-12-06 23:57:52,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:52,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:52,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:52,149 INFO L87 Difference]: Start difference. First operand 8153 states and 13271 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:53,762 INFO L93 Difference]: Finished difference Result 24375 states and 38476 transitions. [2021-12-06 23:57:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:57:53,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:53,806 INFO L225 Difference]: With dead ends: 24375 [2021-12-06 23:57:53,806 INFO L226 Difference]: Without dead ends: 18356 [2021-12-06 23:57:53,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:57:53,825 INFO L933 BasicCegarLoop]: 4438 mSDtfsCounter, 4802 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4820 SdHoareTripleChecker+Valid, 21363 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:53,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4820 Valid, 21363 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:57:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18356 states. [2021-12-06 23:57:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18356 to 13930. [2021-12-06 23:57:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13930 states, 12685 states have (on average 1.5828143476547103) internal successors, (20078), 12752 states have internal predecessors, (20078), 789 states have call successors, (789), 391 states have call predecessors, (789), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-06 23:57:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13930 states to 13930 states and 22447 transitions. [2021-12-06 23:57:54,480 INFO L78 Accepts]: Start accepts. Automaton has 13930 states and 22447 transitions. Word has length 102 [2021-12-06 23:57:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:54,480 INFO L470 AbstractCegarLoop]: Abstraction has 13930 states and 22447 transitions. [2021-12-06 23:57:54,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 13930 states and 22447 transitions. [2021-12-06 23:57:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:54,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:54,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:54,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:57:54,488 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1009949960, now seen corresponding path program 1 times [2021-12-06 23:57:54,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:54,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056091974] [2021-12-06 23:57:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:54,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:54,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056091974] [2021-12-06 23:57:54,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056091974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:54,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:57:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028648429] [2021-12-06 23:57:54,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:54,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:57:54,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:57:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:57:54,565 INFO L87 Difference]: Start difference. First operand 13930 states and 22447 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:55,732 INFO L93 Difference]: Finished difference Result 28753 states and 46200 transitions. [2021-12-06 23:57:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:57:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:55,771 INFO L225 Difference]: With dead ends: 28753 [2021-12-06 23:57:55,771 INFO L226 Difference]: Without dead ends: 16957 [2021-12-06 23:57:55,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:57:55,797 INFO L933 BasicCegarLoop]: 4253 mSDtfsCounter, 4516 mSDsluCounter, 16350 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4529 SdHoareTripleChecker+Valid, 20603 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4529 Valid, 20603 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:57:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-12-06 23:57:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13930. [2021-12-06 23:57:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13930 states, 12685 states have (on average 1.577690185258179) internal successors, (20013), 12752 states have internal predecessors, (20013), 789 states have call successors, (789), 391 states have call predecessors, (789), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-06 23:57:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13930 states to 13930 states and 22382 transitions. [2021-12-06 23:57:56,360 INFO L78 Accepts]: Start accepts. Automaton has 13930 states and 22382 transitions. Word has length 102 [2021-12-06 23:57:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:56,361 INFO L470 AbstractCegarLoop]: Abstraction has 13930 states and 22382 transitions. [2021-12-06 23:57:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 13930 states and 22382 transitions. [2021-12-06 23:57:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 23:57:56,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:56,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:56,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:57:56,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash 724154490, now seen corresponding path program 1 times [2021-12-06 23:57:56,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:56,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264946720] [2021-12-06 23:57:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:56,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:57:56,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264946720] [2021-12-06 23:57:56,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264946720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:56,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:56,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:57:56,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952256796] [2021-12-06 23:57:56,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:56,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:57:56,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:56,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:57:56,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:57:56,438 INFO L87 Difference]: Start difference. First operand 13930 states and 22382 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:58,186 INFO L93 Difference]: Finished difference Result 35984 states and 56644 transitions. [2021-12-06 23:57:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:57:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-06 23:57:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:58,244 INFO L225 Difference]: With dead ends: 35984 [2021-12-06 23:57:58,244 INFO L226 Difference]: Without dead ends: 24189 [2021-12-06 23:57:58,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:57:58,268 INFO L933 BasicCegarLoop]: 4565 mSDtfsCounter, 4925 mSDsluCounter, 12545 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4957 SdHoareTripleChecker+Valid, 17110 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:58,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4957 Valid, 17110 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:57:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24189 states. [2021-12-06 23:57:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24189 to 19766. [2021-12-06 23:57:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19766 states, 17876 states have (on average 1.5501230700380397) internal successors, (27710), 18008 states have internal predecessors, (27710), 1204 states have call successors, (1204), 589 states have call predecessors, (1204), 684 states have return successors, (2239), 1232 states have call predecessors, (2239), 1202 states have call successors, (2239) [2021-12-06 23:57:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19766 states to 19766 states and 31153 transitions. [2021-12-06 23:57:59,121 INFO L78 Accepts]: Start accepts. Automaton has 19766 states and 31153 transitions. Word has length 102 [2021-12-06 23:57:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:59,122 INFO L470 AbstractCegarLoop]: Abstraction has 19766 states and 31153 transitions. [2021-12-06 23:57:59,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:57:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19766 states and 31153 transitions. [2021-12-06 23:57:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 23:57:59,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:59,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:59,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:57:59,152 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:59,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1880616710, now seen corresponding path program 1 times [2021-12-06 23:57:59,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:59,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486044586] [2021-12-06 23:57:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:59,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:57:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:57:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:57:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:57:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:57:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:57:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:57:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:57:59,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486044586] [2021-12-06 23:57:59,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486044586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:57:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169210418] [2021-12-06 23:57:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:59,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:57:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:57:59,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:57:59,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:57:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:59,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:57:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:57:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 23:57:59,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:57:59,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169210418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:59,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:57:59,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 23:57:59,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788241619] [2021-12-06 23:57:59,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:59,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:57:59,518 INFO L87 Difference]: Start difference. First operand 19766 states and 31153 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:00,835 INFO L93 Difference]: Finished difference Result 54681 states and 85501 transitions. [2021-12-06 23:58:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-06 23:58:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:00,919 INFO L225 Difference]: With dead ends: 54681 [2021-12-06 23:58:00,919 INFO L226 Difference]: Without dead ends: 37050 [2021-12-06 23:58:00,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:00,956 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4202 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4613 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:00,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4613 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37050 states. [2021-12-06 23:58:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37050 to 36850. [2021-12-06 23:58:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36850 states, 33128 states have (on average 1.5291898092248248) internal successors, (50659), 33389 states have internal predecessors, (50659), 2352 states have call successors, (2352), 1177 states have call predecessors, (2352), 1368 states have return successors, (4361), 2347 states have call predecessors, (4361), 2350 states have call successors, (4361) [2021-12-06 23:58:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36850 states to 36850 states and 57372 transitions. [2021-12-06 23:58:02,655 INFO L78 Accepts]: Start accepts. Automaton has 36850 states and 57372 transitions. Word has length 165 [2021-12-06 23:58:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 36850 states and 57372 transitions. [2021-12-06 23:58:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36850 states and 57372 transitions. [2021-12-06 23:58:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 23:58:02,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:02,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:02,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:58:02,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:02,901 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1353738266, now seen corresponding path program 1 times [2021-12-06 23:58:02,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:02,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479071306] [2021-12-06 23:58:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:02,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:58:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:58:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:58:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:58:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:58:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:58:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:58:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:58:03,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479071306] [2021-12-06 23:58:03,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479071306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775380757] [2021-12-06 23:58:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:03,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:03,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:03,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:58:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:58:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 23:58:03,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:03,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775380757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:03,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:03,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 23:58:03,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548101155] [2021-12-06 23:58:03,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:03,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:03,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:03,241 INFO L87 Difference]: Start difference. First operand 36850 states and 57372 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:05,995 INFO L93 Difference]: Finished difference Result 105587 states and 164174 transitions. [2021-12-06 23:58:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-06 23:58:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:06,188 INFO L225 Difference]: With dead ends: 105587 [2021-12-06 23:58:06,188 INFO L226 Difference]: Without dead ends: 70872 [2021-12-06 23:58:06,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:06,267 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4220 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4220 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:06,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4220 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70872 states. [2021-12-06 23:58:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70872 to 70476. [2021-12-06 23:58:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70476 states, 63140 states have (on average 1.5168039277795375) internal successors, (95771), 63659 states have internal predecessors, (95771), 4598 states have call successors, (4598), 2353 states have call predecessors, (4598), 2736 states have return successors, (8555), 4527 states have call predecessors, (8555), 4596 states have call successors, (8555) [2021-12-06 23:58:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70476 states to 70476 states and 108924 transitions. [2021-12-06 23:58:09,473 INFO L78 Accepts]: Start accepts. Automaton has 70476 states and 108924 transitions. Word has length 165 [2021-12-06 23:58:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:09,474 INFO L470 AbstractCegarLoop]: Abstraction has 70476 states and 108924 transitions. [2021-12-06 23:58:09,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 70476 states and 108924 transitions. [2021-12-06 23:58:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 23:58:09,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:09,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:09,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:58:09,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:58:09,758 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash 201144122, now seen corresponding path program 1 times [2021-12-06 23:58:09,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:09,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996477491] [2021-12-06 23:58:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:09,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:58:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:58:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:58:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:58:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:58:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:58:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:58:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:58:09,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:09,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996477491] [2021-12-06 23:58:09,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996477491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:09,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709485727] [2021-12-06 23:58:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:09,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:09,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:09,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:09,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:58:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:58:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 23:58:10,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709485727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:10,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:10,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 23:58:10,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715476703] [2021-12-06 23:58:10,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:10,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:10,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:10,091 INFO L87 Difference]: Start difference. First operand 70476 states and 108924 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:15,581 INFO L93 Difference]: Finished difference Result 205197 states and 317852 transitions. [2021-12-06 23:58:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-06 23:58:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:15,952 INFO L225 Difference]: With dead ends: 205197 [2021-12-06 23:58:15,952 INFO L226 Difference]: Without dead ends: 136856 [2021-12-06 23:58:16,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:16,096 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4214 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 4613 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:16,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4214 Valid, 4613 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136856 states. [2021-12-06 23:58:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136856 to 136068. [2021-12-06 23:58:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136068 states, 121796 states have (on average 1.5110430556011691) internal successors, (184039), 122831 states have internal predecessors, (184039), 8798 states have call successors, (8798), 4705 states have call predecessors, (8798), 5472 states have return successors, (16651), 8595 states have call predecessors, (16651), 8796 states have call successors, (16651) [2021-12-06 23:58:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136068 states to 136068 states and 209488 transitions. [2021-12-06 23:58:22,720 INFO L78 Accepts]: Start accepts. Automaton has 136068 states and 209488 transitions. Word has length 165 [2021-12-06 23:58:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:22,721 INFO L470 AbstractCegarLoop]: Abstraction has 136068 states and 209488 transitions. [2021-12-06 23:58:22,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:58:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 136068 states and 209488 transitions. [2021-12-06 23:58:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-06 23:58:22,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:22,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:22,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:58:23,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:58:23,052 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 945544794, now seen corresponding path program 1 times [2021-12-06 23:58:23,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:23,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883964414] [2021-12-06 23:58:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:23,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:58:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:58:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:58:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:58:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:58:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:58:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:58:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:58:23,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883964414] [2021-12-06 23:58:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883964414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272278542] [2021-12-06 23:58:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:23,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:23,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:23,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:58:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:58:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:58:23,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:23,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272278542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:23,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:23,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 23:58:23,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021030616] [2021-12-06 23:58:23,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:23,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:23,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:23,405 INFO L87 Difference]: Start difference. First operand 136068 states and 209488 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:58:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:34,544 INFO L93 Difference]: Finished difference Result 398665 states and 617931 transitions. [2021-12-06 23:58:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:58:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-06 23:58:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:35,378 INFO L225 Difference]: With dead ends: 398665 [2021-12-06 23:58:35,378 INFO L226 Difference]: Without dead ends: 264733 [2021-12-06 23:58:35,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:35,655 INFO L933 BasicCegarLoop]: 4550 mSDtfsCounter, 270 mSDsluCounter, 4272 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 8822 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 8822 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:58:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264733 states. [2021-12-06 23:58:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264733 to 264733. [2021-12-06 23:58:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264733 states, 236722 states have (on average 1.5003632953422157) internal successors, (355169), 238526 states have internal predecessors, (355169), 17065 states have call successors, (17065), 9409 states have call predecessors, (17065), 10944 states have return successors, (36334), 16925 states have call predecessors, (36334), 17063 states have call successors, (36334) [2021-12-06 23:58:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264733 states to 264733 states and 408568 transitions. [2021-12-06 23:58:48,520 INFO L78 Accepts]: Start accepts. Automaton has 264733 states and 408568 transitions. Word has length 165 [2021-12-06 23:58:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:48,521 INFO L470 AbstractCegarLoop]: Abstraction has 264733 states and 408568 transitions. [2021-12-06 23:58:48,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:58:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 264733 states and 408568 transitions. [2021-12-06 23:58:49,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 23:58:49,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:49,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:49,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:58:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:58:49,272 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1826294650, now seen corresponding path program 1 times [2021-12-06 23:58:49,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:49,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545271423] [2021-12-06 23:58:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:49,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:58:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:58:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:58:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:58:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:58:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:58:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 23:58:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:58:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:58:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 23:58:49,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545271423] [2021-12-06 23:58:49,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545271423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943891269] [2021-12-06 23:58:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:49,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:49,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:49,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:58:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:58:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:58:49,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:58:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943891269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:49,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:58:49,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 23:58:49,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234792396] [2021-12-06 23:58:49,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:58:49,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:58:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:58:49,923 INFO L87 Difference]: Start difference. First operand 264733 states and 408568 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 23:59:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:59:11,595 INFO L93 Difference]: Finished difference Result 781639 states and 1213891 transitions. [2021-12-06 23:59:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:59:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 215 [2021-12-06 23:59:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:59:13,471 INFO L225 Difference]: With dead ends: 781639 [2021-12-06 23:59:13,472 INFO L226 Difference]: Without dead ends: 519049 [2021-12-06 23:59:14,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:59:14,209 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4151 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4151 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:59:14,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4151 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:59:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519049 states. [2021-12-06 23:59:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519049 to 515909. [2021-12-06 23:59:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515909 states, 461754 states have (on average 1.4988435400667888) internal successors, (692097), 465358 states have internal predecessors, (692097), 32409 states have call successors, (32409), 18673 states have call predecessors, (32409), 21744 states have return successors, (69930), 32005 states have call predecessors, (69930), 32407 states have call successors, (69930) [2021-12-06 23:59:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515909 states to 515909 states and 794436 transitions. [2021-12-06 23:59:40,280 INFO L78 Accepts]: Start accepts. Automaton has 515909 states and 794436 transitions. Word has length 215 [2021-12-06 23:59:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:40,280 INFO L470 AbstractCegarLoop]: Abstraction has 515909 states and 794436 transitions. [2021-12-06 23:59:40,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 23:59:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 515909 states and 794436 transitions. [2021-12-06 23:59:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 23:59:41,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:41,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:59:41,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 23:59:41,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:59:41,816 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1809048594, now seen corresponding path program 1 times [2021-12-06 23:59:41,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:41,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003919543] [2021-12-06 23:59:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:41,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 23:59:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-06 23:59:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:59:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:59:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 23:59:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 23:59:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:59:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-06 23:59:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 23:59:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-06 23:59:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 23:59:41,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003919543] [2021-12-06 23:59:41,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003919543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556843981] [2021-12-06 23:59:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:41,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:41,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:41,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:59:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:42,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 23:59:42,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:59:42,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:59:42,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556843981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:42,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:59:42,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 23:59:42,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366538006] [2021-12-06 23:59:42,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:59:42,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:59:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:59:42,329 INFO L87 Difference]: Start difference. First operand 515909 states and 794436 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 00:00:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:25,554 INFO L93 Difference]: Finished difference Result 1531929 states and 2375191 transitions. [2021-12-07 00:00:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:00:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 215 [2021-12-07 00:00:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:29,365 INFO L225 Difference]: With dead ends: 1531929 [2021-12-07 00:00:29,365 INFO L226 Difference]: Without dead ends: 1018163 [2021-12-07 00:00:30,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:00:30,932 INFO L933 BasicCegarLoop]: 4306 mSDtfsCounter, 4154 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4154 SdHoareTripleChecker+Valid, 4591 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:30,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4154 Valid, 4591 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:00:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018163 states. [2021-12-07 00:01:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018163 to 1011887. [2021-12-07 00:01:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011887 states, 905480 states have (on average 1.4963455846622786) internal successors, (1354911), 912684 states have internal predecessors, (1354911), 63063 states have call successors, (63063), 37199 states have call predecessors, (63063), 43342 states have return successors, (137070), 62131 states have call predecessors, (137070), 63061 states have call successors, (137070) [2021-12-07 00:01:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011887 states to 1011887 states and 1555044 transitions. [2021-12-07 00:01:25,283 INFO L78 Accepts]: Start accepts. Automaton has 1011887 states and 1555044 transitions. Word has length 215 [2021-12-07 00:01:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:01:25,283 INFO L470 AbstractCegarLoop]: Abstraction has 1011887 states and 1555044 transitions. [2021-12-07 00:01:25,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-07 00:01:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1011887 states and 1555044 transitions. [2021-12-07 00:01:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-07 00:01:28,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:01:28,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:28,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:01:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:01:28,750 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:01:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -745480504, now seen corresponding path program 1 times [2021-12-07 00:01:28,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:28,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240397875] [2021-12-07 00:01:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:28,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 00:01:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 00:01:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:01:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:01:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:01:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:01:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-07 00:01:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:01:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-07 00:01:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:01:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-07 00:01:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-07 00:01:28,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240397875] [2021-12-07 00:01:28,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240397875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:01:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566107502] [2021-12-07 00:01:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:28,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:01:28,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:01:28,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:01:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:01:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:01:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-07 00:01:29,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:01:29,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566107502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:01:29,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:01:29,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-07 00:01:29,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725598555] [2021-12-07 00:01:29,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:01:29,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:01:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:01:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:01:29,086 INFO L87 Difference]: Start difference. First operand 1011887 states and 1555044 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 00:02:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:02:13,793 INFO L93 Difference]: Finished difference Result 1590611 states and 2464314 transitions. [2021-12-07 00:02:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:02:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 235 [2021-12-07 00:02:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:02:17,318 INFO L225 Difference]: With dead ends: 1590611 [2021-12-07 00:02:17,318 INFO L226 Difference]: Without dead ends: 892989 [2021-12-07 00:02:18,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:02:18,980 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 4185 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4185 SdHoareTripleChecker+Valid, 4369 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:02:18,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4185 Valid, 4369 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:02:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892989 states. [2021-12-07 00:03:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892989 to 890451. [2021-12-07 00:03:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890451 states, 798740 states have (on average 1.476599394045622) internal successors, (1179419), 804168 states have internal predecessors, (1179419), 53683 states have call successors, (53683), 33419 states have call predecessors, (53683), 38026 states have return successors, (110353), 52927 states have call predecessors, (110353), 53681 states have call successors, (110353) [2021-12-07 00:03:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890451 states to 890451 states and 1343455 transitions. [2021-12-07 00:03:10,218 INFO L78 Accepts]: Start accepts. Automaton has 890451 states and 1343455 transitions. Word has length 235 [2021-12-07 00:03:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:03:10,219 INFO L470 AbstractCegarLoop]: Abstraction has 890451 states and 1343455 transitions. [2021-12-07 00:03:10,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 00:03:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 890451 states and 1343455 transitions. [2021-12-07 00:03:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-07 00:03:12,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:03:12,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:03:12,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:03:12,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:12,745 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:03:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -168551863, now seen corresponding path program 1 times [2021-12-07 00:03:12,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:12,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288405457] [2021-12-07 00:03:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:12,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 00:03:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 00:03:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:03:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:03:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:03:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-07 00:03:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-07 00:03:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:03:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-07 00:03:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:03:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-12-07 00:03:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-07 00:03:12,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288405457] [2021-12-07 00:03:12,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288405457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:03:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602337363] [2021-12-07 00:03:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:12,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:03:12,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:03:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:03:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:03:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:03:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-07 00:03:13,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:03:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602337363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:03:13,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:03:13,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-07 00:03:13,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947401197] [2021-12-07 00:03:13,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:03:13,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:03:13,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:03:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:03:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:03:13,138 INFO L87 Difference]: Start difference. First operand 890451 states and 1343455 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 00:04:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:04:03,110 INFO L93 Difference]: Finished difference Result 1553128 states and 2326033 transitions. [2021-12-07 00:04:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:04:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 235 [2021-12-07 00:04:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:04:06,753 INFO L225 Difference]: With dead ends: 1553128 [2021-12-07 00:04:06,753 INFO L226 Difference]: Without dead ends: 951093 [2021-12-07 00:04:08,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:04:08,165 INFO L933 BasicCegarLoop]: 4294 mSDtfsCounter, 4182 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:04:08,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 4593 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:04:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951093 states. [2021-12-07 00:05:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951093 to 949907. [2021-12-07 00:05:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949907 states, 853707 states have (on average 1.448780436379226) internal successors, (1236834), 859135 states have internal predecessors, (1236834), 55093 states have call successors, (55093), 36461 states have call predecessors, (55093), 41105 states have return successors, (114842), 54374 states have call predecessors, (114842), 55091 states have call successors, (114842) [2021-12-07 00:05:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949907 states to 949907 states and 1406769 transitions. [2021-12-07 00:05:06,240 INFO L78 Accepts]: Start accepts. Automaton has 949907 states and 1406769 transitions. Word has length 235 [2021-12-07 00:05:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:05:06,240 INFO L470 AbstractCegarLoop]: Abstraction has 949907 states and 1406769 transitions. [2021-12-07 00:05:06,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-07 00:05:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 949907 states and 1406769 transitions. [2021-12-07 00:05:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-07 00:05:08,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:05:08,612 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-07 00:05:08,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:05:08,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:05:08,814 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:05:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:05:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash -830259162, now seen corresponding path program 1 times [2021-12-07 00:05:08,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:05:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215480367] [2021-12-07 00:05:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:05:08,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:05:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 00:05:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 00:05:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-07 00:05:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-07 00:05:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-07 00:05:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-07 00:05:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:05:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-07 00:05:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-07 00:05:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-07 00:05:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-12-07 00:05:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-07 00:05:08,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:05:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215480367] [2021-12-07 00:05:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215480367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:05:08,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688407828] [2021-12-07 00:05:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:05:08,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:05:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:05:08,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:05:08,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bccf0743-52eb-47bc-9a75-b7d1bcf8dcf6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:05:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:05:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 00:05:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:05:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-07 00:05:09,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:05:09,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688407828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:05:09,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:05:09,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-07 00:05:09,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670689657] [2021-12-07 00:05:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:05:09,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:05:09,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:05:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:05:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:05:09,196 INFO L87 Difference]: Start difference. First operand 949907 states and 1406769 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11)