./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/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 16e0086acf2f158eb0b3309fc7ab7b15830d1af8d2ef9923a4f4e2311d9d7a3f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:36:14,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:36:14,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:36:14,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:36:14,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:36:14,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:36:14,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:36:14,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:36:14,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:36:14,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:36:14,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:36:14,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:36:14,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:36:14,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:36:14,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:36:14,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:36:14,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:36:14,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:36:14,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:36:14,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:36:14,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:36:14,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:36:14,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:36:14,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:36:14,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:36:14,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:36:14,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:36:14,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:36:14,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:36:14,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:36:14,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:36:14,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:36:14,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:36:14,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:36:14,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:36:14,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:36:14,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:36:14,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:36:14,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:36:14,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:36:14,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:36:14,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:36:14,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:36:14,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:36:14,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:36:14,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:36:14,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:36:14,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:36:14,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:36:14,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:36:14,511 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:36:14,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:36:14,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:36:14,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:36:14,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:36:14,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:36:14,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:36:14,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:36:14,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:36:14,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:36:14,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:36:14,514 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:36:14,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:36:14,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:36:14,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:36:14,515 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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e0086acf2f158eb0b3309fc7ab7b15830d1af8d2ef9923a4f4e2311d9d7a3f [2021-12-06 20:36:14,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:36:14,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:36:14,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:36:14,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:36:14,722 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:36:14,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-12-06 20:36:14,765 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/data/4e0f3b9db/7872152cfb1a4bb2ba3e2cbc5b359cac/FLAG38156845f [2021-12-06 20:36:15,205 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:36:15,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-12-06 20:36:15,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/data/4e0f3b9db/7872152cfb1a4bb2ba3e2cbc5b359cac/FLAG38156845f [2021-12-06 20:36:15,231 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/data/4e0f3b9db/7872152cfb1a4bb2ba3e2cbc5b359cac [2021-12-06 20:36:15,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:36:15,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:36:15,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:36:15,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:36:15,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:36:15,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119a285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15, skipping insertion in model container [2021-12-06 20:36:15,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:36:15,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:36:15,562 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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2021-12-06 20:36:15,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:36:15,574 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:36:15,670 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_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c[65677,65690] [2021-12-06 20:36:15,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:36:15,685 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:36:15,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15 WrapperNode [2021-12-06 20:36:15,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:36:15,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:36:15,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:36:15,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:36:15,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,761 INFO L137 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2133 [2021-12-06 20:36:15,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:36:15,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:36:15,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:36:15,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:36:15,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:36:15,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:36:15,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:36:15,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:36:15,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (1/1) ... [2021-12-06 20:36:15,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:36:15,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:36:15,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:36:15,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b8950e-4f1c-497d-b6ac-29fc343bbb3e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:36:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:36:15,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:36:15,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:36:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:36:16,065 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:36:16,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:36:17,100 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:36:17,117 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:36:17,117 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:36:17,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:36:17 BoogieIcfgContainer [2021-12-06 20:36:17,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:36:17,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:36:17,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:36:17,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:36:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:36:15" (1/3) ... [2021-12-06 20:36:17,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27df510f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:36:17, skipping insertion in model container [2021-12-06 20:36:17,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:36:15" (2/3) ... [2021-12-06 20:36:17,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27df510f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:36:17, skipping insertion in model container [2021-12-06 20:36:17,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:36:17" (3/3) ... [2021-12-06 20:36:17,129 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.ufo.UNBOUNDED.pals.c [2021-12-06 20:36:17,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:36:17,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:36:17,172 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:36:17,177 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 20:36:17,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:36:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 746 states, 744 states have (on average 1.8454301075268817) internal successors, (1373), 745 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 20:36:17,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:17,222 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:17,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1610308336, now seen corresponding path program 1 times [2021-12-06 20:36:17,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216012935] [2021-12-06 20:36:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:17,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:17,531 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 20:36:17,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216012935] [2021-12-06 20:36:17,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216012935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:17,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:17,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:36:17,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932213187] [2021-12-06 20:36:17,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:36:17,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:36:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:36:17,570 INFO L87 Difference]: Start difference. First operand has 746 states, 744 states have (on average 1.8454301075268817) internal successors, (1373), 745 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:17,636 INFO L93 Difference]: Finished difference Result 938 states and 1707 transitions. [2021-12-06 20:36:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:36:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-06 20:36:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:17,655 INFO L225 Difference]: With dead ends: 938 [2021-12-06 20:36:17,656 INFO L226 Difference]: Without dead ends: 742 [2021-12-06 20:36:17,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:36:17,662 INFO L933 BasicCegarLoop]: 1366 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:17,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-06 20:36:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 742. [2021-12-06 20:36:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.843454790823212) internal successors, (1366), 741 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1366 transitions. [2021-12-06 20:36:17,737 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1366 transitions. Word has length 153 [2021-12-06 20:36:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:17,738 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1366 transitions. [2021-12-06 20:36:17,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1366 transitions. [2021-12-06 20:36:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 20:36:17,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:17,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:17,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:36:17,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1100835246, now seen corresponding path program 1 times [2021-12-06 20:36:17,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:17,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285066632] [2021-12-06 20:36:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:17,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:17,888 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 20:36:17,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285066632] [2021-12-06 20:36:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285066632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:17,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:36:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553681184] [2021-12-06 20:36:17,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:36:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:36:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:36:17,892 INFO L87 Difference]: Start difference. First operand 742 states and 1366 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:18,004 INFO L93 Difference]: Finished difference Result 937 states and 1700 transitions. [2021-12-06 20:36:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:36:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-06 20:36:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:18,012 INFO L225 Difference]: With dead ends: 937 [2021-12-06 20:36:18,013 INFO L226 Difference]: Without dead ends: 742 [2021-12-06 20:36:18,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:36:18,016 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 3 mSDsluCounter, 4024 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5388 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:18,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5388 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-06 20:36:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 742. [2021-12-06 20:36:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.7557354925775979) internal successors, (1301), 741 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1301 transitions. [2021-12-06 20:36:18,051 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1301 transitions. Word has length 153 [2021-12-06 20:36:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:18,051 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1301 transitions. [2021-12-06 20:36:18,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1301 transitions. [2021-12-06 20:36:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-06 20:36:18,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:18,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:36:18,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -698376180, now seen corresponding path program 1 times [2021-12-06 20:36:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:18,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587001862] [2021-12-06 20:36:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:18,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:18,220 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 20:36:18,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587001862] [2021-12-06 20:36:18,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587001862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:18,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:18,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:18,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718943256] [2021-12-06 20:36:18,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:18,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:18,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,224 INFO L87 Difference]: Start difference. First operand 742 states and 1301 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:18,274 INFO L93 Difference]: Finished difference Result 1110 states and 1935 transitions. [2021-12-06 20:36:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2021-12-06 20:36:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:18,279 INFO L225 Difference]: With dead ends: 1110 [2021-12-06 20:36:18,280 INFO L226 Difference]: Without dead ends: 919 [2021-12-06 20:36:18,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,282 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 295 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 2524 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-12-06 20:36:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 916. [2021-12-06 20:36:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.7453551912568306) internal successors, (1597), 915 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1597 transitions. [2021-12-06 20:36:18,317 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1597 transitions. Word has length 217 [2021-12-06 20:36:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:18,318 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1597 transitions. [2021-12-06 20:36:18,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1597 transitions. [2021-12-06 20:36:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-06 20:36:18,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:18,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:18,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:36:18,322 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash -128120140, now seen corresponding path program 1 times [2021-12-06 20:36:18,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698052073] [2021-12-06 20:36:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:18,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:18,437 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 20:36:18,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698052073] [2021-12-06 20:36:18,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698052073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:18,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:18,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:18,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895336640] [2021-12-06 20:36:18,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:18,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:18,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,439 INFO L87 Difference]: Start difference. First operand 916 states and 1597 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:18,476 INFO L93 Difference]: Finished difference Result 1622 states and 2805 transitions. [2021-12-06 20:36:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2021-12-06 20:36:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:18,482 INFO L225 Difference]: With dead ends: 1622 [2021-12-06 20:36:18,482 INFO L226 Difference]: Without dead ends: 1257 [2021-12-06 20:36:18,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,485 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 295 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2537 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 20:36:18,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 2537 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-12-06 20:36:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1253. [2021-12-06 20:36:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 1.7348242811501597) internal successors, (2172), 1252 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 2172 transitions. [2021-12-06 20:36:18,517 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 2172 transitions. Word has length 221 [2021-12-06 20:36:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:18,518 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 2172 transitions. [2021-12-06 20:36:18,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 2172 transitions. [2021-12-06 20:36:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-06 20:36:18,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:18,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:18,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:36:18,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1683241124, now seen corresponding path program 1 times [2021-12-06 20:36:18,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:18,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41185363] [2021-12-06 20:36:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:18,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:18,624 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 20:36:18,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:18,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41185363] [2021-12-06 20:36:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41185363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:18,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:18,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011728622] [2021-12-06 20:36:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:18,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:18,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,627 INFO L87 Difference]: Start difference. First operand 1253 states and 2172 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:18,669 INFO L93 Difference]: Finished difference Result 2609 states and 4486 transitions. [2021-12-06 20:36:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:18,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-06 20:36:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:18,678 INFO L225 Difference]: With dead ends: 2609 [2021-12-06 20:36:18,678 INFO L226 Difference]: Without dead ends: 1907 [2021-12-06 20:36:18,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,681 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 287 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2538 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 20:36:18,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 2538 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-12-06 20:36:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1901. [2021-12-06 20:36:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.7221052631578948) internal successors, (3272), 1900 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 3272 transitions. [2021-12-06 20:36:18,727 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 3272 transitions. Word has length 225 [2021-12-06 20:36:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:18,728 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 3272 transitions. [2021-12-06 20:36:18,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 3272 transitions. [2021-12-06 20:36:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 20:36:18,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:18,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:18,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:36:18,733 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1320539652, now seen corresponding path program 1 times [2021-12-06 20:36:18,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:18,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492366112] [2021-12-06 20:36:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:18,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:18,826 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 20:36:18,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:18,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492366112] [2021-12-06 20:36:18,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492366112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:18,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:18,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:18,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063534035] [2021-12-06 20:36:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:18,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:18,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,828 INFO L87 Difference]: Start difference. First operand 1901 states and 3272 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:18,878 INFO L93 Difference]: Finished difference Result 4505 states and 7698 transitions. [2021-12-06 20:36:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-12-06 20:36:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:18,892 INFO L225 Difference]: With dead ends: 4505 [2021-12-06 20:36:18,892 INFO L226 Difference]: Without dead ends: 3155 [2021-12-06 20:36:18,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:18,895 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 279 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2539 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 20:36:18,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2539 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2021-12-06 20:36:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 3145. [2021-12-06 20:36:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 1.7086513994910941) internal successors, (5372), 3144 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5372 transitions. [2021-12-06 20:36:18,964 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5372 transitions. Word has length 229 [2021-12-06 20:36:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 5372 transitions. [2021-12-06 20:36:18,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5372 transitions. [2021-12-06 20:36:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-06 20:36:18,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:18,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:18,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:36:18,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2073741652, now seen corresponding path program 1 times [2021-12-06 20:36:18,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:18,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540953608] [2021-12-06 20:36:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:18,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:19,089 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 20:36:19,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:19,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540953608] [2021-12-06 20:36:19,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540953608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:19,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:19,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:19,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280101487] [2021-12-06 20:36:19,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:19,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:19,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:19,091 INFO L87 Difference]: Start difference. First operand 3145 states and 5372 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:19,167 INFO L93 Difference]: Finished difference Result 8141 states and 13822 transitions. [2021-12-06 20:36:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-12-06 20:36:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:19,192 INFO L225 Difference]: With dead ends: 8141 [2021-12-06 20:36:19,192 INFO L226 Difference]: Without dead ends: 5547 [2021-12-06 20:36:19,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:19,196 INFO L933 BasicCegarLoop]: 1298 mSDtfsCounter, 271 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2540 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 20:36:19,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 2540 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5547 states. [2021-12-06 20:36:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5547 to 5529. [2021-12-06 20:36:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5529 states, 5528 states have (on average 1.695369030390738) internal successors, (9372), 5528 states have internal predecessors, (9372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5529 states to 5529 states and 9372 transitions. [2021-12-06 20:36:19,335 INFO L78 Accepts]: Start accepts. Automaton has 5529 states and 9372 transitions. Word has length 233 [2021-12-06 20:36:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 5529 states and 9372 transitions. [2021-12-06 20:36:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5529 states and 9372 transitions. [2021-12-06 20:36:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-06 20:36:19,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:19,340 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:19,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:36:19,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash 337897812, now seen corresponding path program 1 times [2021-12-06 20:36:19,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:19,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147867516] [2021-12-06 20:36:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:19,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:19,436 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 20:36:19,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147867516] [2021-12-06 20:36:19,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147867516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:19,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:19,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:36:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322207405] [2021-12-06 20:36:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:19,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:36:19,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:36:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:36:19,438 INFO L87 Difference]: Start difference. First operand 5529 states and 9372 transitions. Second operand has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:20,062 INFO L93 Difference]: Finished difference Result 33757 states and 57350 transitions. [2021-12-06 20:36:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:36:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-12-06 20:36:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:20,144 INFO L225 Difference]: With dead ends: 33757 [2021-12-06 20:36:20,144 INFO L226 Difference]: Without dead ends: 28779 [2021-12-06 20:36:20,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:36:20,154 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 3262 mSDsluCounter, 12480 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 13797 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:20,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3262 Valid, 13797 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:36:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28779 states. [2021-12-06 20:36:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28779 to 10323. [2021-12-06 20:36:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10323 states, 10322 states have (on average 1.690854485564813) internal successors, (17453), 10322 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 17453 transitions. [2021-12-06 20:36:20,532 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 17453 transitions. Word has length 237 [2021-12-06 20:36:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 10323 states and 17453 transitions. [2021-12-06 20:36:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 17453 transitions. [2021-12-06 20:36:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 20:36:20,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:20,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:20,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:36:20,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash -381481659, now seen corresponding path program 1 times [2021-12-06 20:36:20,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:20,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997573485] [2021-12-06 20:36:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:20,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:20,617 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 20:36:20,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:20,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997573485] [2021-12-06 20:36:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997573485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:20,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:20,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:36:20,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983137215] [2021-12-06 20:36:20,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:20,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:36:20,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:36:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:36:20,618 INFO L87 Difference]: Start difference. First operand 10323 states and 17453 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:20,887 INFO L93 Difference]: Finished difference Result 30257 states and 51271 transitions. [2021-12-06 20:36:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:36:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-06 20:36:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:20,916 INFO L225 Difference]: With dead ends: 30257 [2021-12-06 20:36:20,916 INFO L226 Difference]: Without dead ends: 20485 [2021-12-06 20:36:20,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:36:20,928 INFO L933 BasicCegarLoop]: 1304 mSDtfsCounter, 959 mSDsluCounter, 2847 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 4151 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:20,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 4151 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:36:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20485 states. [2021-12-06 20:36:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20485 to 15371. [2021-12-06 20:36:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15371 states, 15370 states have (on average 1.6913467794404684) internal successors, (25996), 15370 states have internal predecessors, (25996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15371 states to 15371 states and 25996 transitions. [2021-12-06 20:36:21,322 INFO L78 Accepts]: Start accepts. Automaton has 15371 states and 25996 transitions. Word has length 238 [2021-12-06 20:36:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:21,322 INFO L470 AbstractCegarLoop]: Abstraction has 15371 states and 25996 transitions. [2021-12-06 20:36:21,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15371 states and 25996 transitions. [2021-12-06 20:36:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 20:36:21,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:21,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:21,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:36:21,330 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1038404437, now seen corresponding path program 1 times [2021-12-06 20:36:21,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243685803] [2021-12-06 20:36:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:21,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:21,408 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 20:36:21,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:21,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243685803] [2021-12-06 20:36:21,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243685803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:21,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:21,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:36:21,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121064857] [2021-12-06 20:36:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:21,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:36:21,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:36:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:36:21,410 INFO L87 Difference]: Start difference. First operand 15371 states and 25996 transitions. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:21,723 INFO L93 Difference]: Finished difference Result 45331 states and 76731 transitions. [2021-12-06 20:36:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:36:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-12-06 20:36:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:21,768 INFO L225 Difference]: With dead ends: 45331 [2021-12-06 20:36:21,768 INFO L226 Difference]: Without dead ends: 30511 [2021-12-06 20:36:21,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:36:21,784 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 959 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:21,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 4139 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30511 states. [2021-12-06 20:36:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30511 to 22893. [2021-12-06 20:36:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22893 states, 22892 states have (on average 1.6890616809365717) internal successors, (38666), 22892 states have internal predecessors, (38666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:22,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22893 states to 22893 states and 38666 transitions. [2021-12-06 20:36:22,254 INFO L78 Accepts]: Start accepts. Automaton has 22893 states and 38666 transitions. Word has length 239 [2021-12-06 20:36:22,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:22,254 INFO L470 AbstractCegarLoop]: Abstraction has 22893 states and 38666 transitions. [2021-12-06 20:36:22,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 22893 states and 38666 transitions. [2021-12-06 20:36:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-06 20:36:22,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:22,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:22,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:36:22,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 240830268, now seen corresponding path program 1 times [2021-12-06 20:36:22,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:22,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453312527] [2021-12-06 20:36:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:22,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:22,360 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 20:36:22,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:22,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453312527] [2021-12-06 20:36:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453312527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:22,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:22,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:36:22,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967466398] [2021-12-06 20:36:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:36:22,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:36:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:36:22,363 INFO L87 Difference]: Start difference. First operand 22893 states and 38666 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:22,819 INFO L93 Difference]: Finished difference Result 67879 states and 114783 transitions. [2021-12-06 20:36:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:36:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-12-06 20:36:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:22,886 INFO L225 Difference]: With dead ends: 67879 [2021-12-06 20:36:22,886 INFO L226 Difference]: Without dead ends: 45537 [2021-12-06 20:36:22,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:36:22,910 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 957 mSDsluCounter, 2851 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 4141 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:22,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 4141 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:36:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45537 states. [2021-12-06 20:36:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45537 to 34145. [2021-12-06 20:36:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34145 states, 34144 states have (on average 1.6870899718837864) internal successors, (57604), 34144 states have internal predecessors, (57604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34145 states to 34145 states and 57604 transitions. [2021-12-06 20:36:23,545 INFO L78 Accepts]: Start accepts. Automaton has 34145 states and 57604 transitions. Word has length 240 [2021-12-06 20:36:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:23,545 INFO L470 AbstractCegarLoop]: Abstraction has 34145 states and 57604 transitions. [2021-12-06 20:36:23,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 34145 states and 57604 transitions. [2021-12-06 20:36:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:23,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:23,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:23,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:36:23,554 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1477358553, now seen corresponding path program 1 times [2021-12-06 20:36:23,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:23,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407459365] [2021-12-06 20:36:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:23,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:23,621 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 20:36:23,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407459365] [2021-12-06 20:36:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407459365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:23,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:23,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:23,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972550457] [2021-12-06 20:36:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:23,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:23,623 INFO L87 Difference]: Start difference. First operand 34145 states and 57604 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:24,182 INFO L93 Difference]: Finished difference Result 76412 states and 129194 transitions. [2021-12-06 20:36:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:24,248 INFO L225 Difference]: With dead ends: 76412 [2021-12-06 20:36:24,249 INFO L226 Difference]: Without dead ends: 53073 [2021-12-06 20:36:24,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:24,265 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 302 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:24,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 2813 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53073 states. [2021-12-06 20:36:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53073 to 53071. [2021-12-06 20:36:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53071 states, 53070 states have (on average 1.684680610514415) internal successors, (89406), 53070 states have internal predecessors, (89406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53071 states to 53071 states and 89406 transitions. [2021-12-06 20:36:25,144 INFO L78 Accepts]: Start accepts. Automaton has 53071 states and 89406 transitions. Word has length 241 [2021-12-06 20:36:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:25,144 INFO L470 AbstractCegarLoop]: Abstraction has 53071 states and 89406 transitions. [2021-12-06 20:36:25,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 53071 states and 89406 transitions. [2021-12-06 20:36:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:25,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:25,149 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:36:25,149 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 384077095, now seen corresponding path program 1 times [2021-12-06 20:36:25,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538566078] [2021-12-06 20:36:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:25,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:25,217 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 20:36:25,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538566078] [2021-12-06 20:36:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538566078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:25,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:25,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032368692] [2021-12-06 20:36:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:25,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:25,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:25,219 INFO L87 Difference]: Start difference. First operand 53071 states and 89406 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:26,068 INFO L93 Difference]: Finished difference Result 118198 states and 199124 transitions. [2021-12-06 20:36:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:26,157 INFO L225 Difference]: With dead ends: 118198 [2021-12-06 20:36:26,157 INFO L226 Difference]: Without dead ends: 81957 [2021-12-06 20:36:26,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:26,178 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 294 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:26,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 2790 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81957 states. [2021-12-06 20:36:27,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81957 to 81955. [2021-12-06 20:36:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81955 states, 81954 states have (on average 1.6790760670620104) internal successors, (137607), 81954 states have internal predecessors, (137607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81955 states to 81955 states and 137607 transitions. [2021-12-06 20:36:27,393 INFO L78 Accepts]: Start accepts. Automaton has 81955 states and 137607 transitions. Word has length 241 [2021-12-06 20:36:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 81955 states and 137607 transitions. [2021-12-06 20:36:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81955 states and 137607 transitions. [2021-12-06 20:36:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:27,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:27,396 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:27,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:36:27,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 698928679, now seen corresponding path program 1 times [2021-12-06 20:36:27,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:27,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480710448] [2021-12-06 20:36:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:27,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:27,462 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 20:36:27,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:27,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480710448] [2021-12-06 20:36:27,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480710448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:27,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:27,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:27,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755858411] [2021-12-06 20:36:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:27,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:27,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:27,463 INFO L87 Difference]: Start difference. First operand 81955 states and 137607 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:29,036 INFO L93 Difference]: Finished difference Result 182131 states and 305803 transitions. [2021-12-06 20:36:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:29,218 INFO L225 Difference]: With dead ends: 182131 [2021-12-06 20:36:29,218 INFO L226 Difference]: Without dead ends: 125892 [2021-12-06 20:36:29,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:29,267 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 286 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2759 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:29,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2759 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125892 states. [2021-12-06 20:36:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125892 to 125890. [2021-12-06 20:36:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125890 states, 125889 states have (on average 1.6726719570415207) internal successors, (210571), 125889 states have internal predecessors, (210571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125890 states to 125890 states and 210571 transitions. [2021-12-06 20:36:31,444 INFO L78 Accepts]: Start accepts. Automaton has 125890 states and 210571 transitions. Word has length 241 [2021-12-06 20:36:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:31,445 INFO L470 AbstractCegarLoop]: Abstraction has 125890 states and 210571 transitions. [2021-12-06 20:36:31,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 125890 states and 210571 transitions. [2021-12-06 20:36:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:31,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:31,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:31,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:36:31,447 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1094586151, now seen corresponding path program 1 times [2021-12-06 20:36:31,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938699055] [2021-12-06 20:36:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:31,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:31,513 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 20:36:31,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938699055] [2021-12-06 20:36:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938699055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:31,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:31,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692718363] [2021-12-06 20:36:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:31,514 INFO L87 Difference]: Start difference. First operand 125890 states and 210571 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:33,733 INFO L93 Difference]: Finished difference Result 244815 states and 409707 transitions. [2021-12-06 20:36:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:33,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:33,994 INFO L225 Difference]: With dead ends: 244815 [2021-12-06 20:36:33,994 INFO L226 Difference]: Without dead ends: 177362 [2021-12-06 20:36:34,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:34,046 INFO L933 BasicCegarLoop]: 1475 mSDtfsCounter, 278 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:34,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 2729 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177362 states. [2021-12-06 20:36:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177362 to 177360. [2021-12-06 20:36:36,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177360 states, 177359 states have (on average 1.6669748927316912) internal successors, (295653), 177359 states have internal predecessors, (295653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177360 states to 177360 states and 295653 transitions. [2021-12-06 20:36:37,129 INFO L78 Accepts]: Start accepts. Automaton has 177360 states and 295653 transitions. Word has length 241 [2021-12-06 20:36:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:37,130 INFO L470 AbstractCegarLoop]: Abstraction has 177360 states and 295653 transitions. [2021-12-06 20:36:37,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 177360 states and 295653 transitions. [2021-12-06 20:36:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:37,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:37,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:37,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:36:37,132 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1096527833, now seen corresponding path program 1 times [2021-12-06 20:36:37,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401841031] [2021-12-06 20:36:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:37,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:37,197 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 20:36:37,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401841031] [2021-12-06 20:36:37,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401841031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:37,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:37,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:36:37,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045830644] [2021-12-06 20:36:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:37,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:36:37,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:36:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:37,199 INFO L87 Difference]: Start difference. First operand 177360 states and 295653 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:40,203 INFO L93 Difference]: Finished difference Result 342985 states and 572089 transitions. [2021-12-06 20:36:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:36:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:40,568 INFO L225 Difference]: With dead ends: 342985 [2021-12-06 20:36:40,568 INFO L226 Difference]: Without dead ends: 248182 [2021-12-06 20:36:40,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:36:40,629 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 270 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 2698 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:40,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 2698 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248182 states. [2021-12-06 20:36:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248182 to 248180. [2021-12-06 20:36:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248180 states, 248179 states have (on average 1.6606360731568748) internal successors, (412135), 248179 states have internal predecessors, (412135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248180 states to 248180 states and 412135 transitions. [2021-12-06 20:36:45,374 INFO L78 Accepts]: Start accepts. Automaton has 248180 states and 412135 transitions. Word has length 241 [2021-12-06 20:36:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:36:45,375 INFO L470 AbstractCegarLoop]: Abstraction has 248180 states and 412135 transitions. [2021-12-06 20:36:45,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 248180 states and 412135 transitions. [2021-12-06 20:36:45,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-06 20:36:45,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:36:45,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:36:45,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:36:45,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:36:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:36:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1411404802, now seen corresponding path program 1 times [2021-12-06 20:36:45,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:36:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658297806] [2021-12-06 20:36:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:36:45,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:36:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:36:45,452 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 20:36:45,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:36:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658297806] [2021-12-06 20:36:45,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658297806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:36:45,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:36:45,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:36:45,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738488067] [2021-12-06 20:36:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:36:45,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:36:45,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:36:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:36:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:36:45,453 INFO L87 Difference]: Start difference. First operand 248180 states and 412135 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:36:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:36:52,275 INFO L93 Difference]: Finished difference Result 814835 states and 1354581 transitions. [2021-12-06 20:36:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:36:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-12-06 20:36:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:36:53,163 INFO L225 Difference]: With dead ends: 814835 [2021-12-06 20:36:53,163 INFO L226 Difference]: Without dead ends: 567288 [2021-12-06 20:36:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:36:53,474 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 955 mSDsluCounter, 2853 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 4143 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:36:53,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 4143 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:36:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567288 states. [2021-12-06 20:37:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567288 to 407009. [2021-12-06 20:37:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407009 states, 407008 states have (on average 1.6565399205912414) internal successors, (674225), 407008 states have internal predecessors, (674225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407009 states to 407009 states and 674225 transitions. [2021-12-06 20:37:02,367 INFO L78 Accepts]: Start accepts. Automaton has 407009 states and 674225 transitions. Word has length 241 [2021-12-06 20:37:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:02,368 INFO L470 AbstractCegarLoop]: Abstraction has 407009 states and 674225 transitions. [2021-12-06 20:37:02,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 407009 states and 674225 transitions. [2021-12-06 20:37:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-06 20:37:02,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:02,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:37:02,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 20:37:02,370 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:37:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -786485965, now seen corresponding path program 1 times [2021-12-06 20:37:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:37:02,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377794964] [2021-12-06 20:37:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:37:02,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:37:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:37:02,613 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 20:37:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:37:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377794964] [2021-12-06 20:37:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377794964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:37:02,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:37:02,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:37:02,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67811703] [2021-12-06 20:37:02,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:37:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:37:02,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:37:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:37:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:37:02,614 INFO L87 Difference]: Start difference. First operand 407009 states and 674225 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:14,473 INFO L93 Difference]: Finished difference Result 1326857 states and 2200477 transitions. [2021-12-06 20:37:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:37:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-12-06 20:37:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:16,049 INFO L225 Difference]: With dead ends: 1326857 [2021-12-06 20:37:16,049 INFO L226 Difference]: Without dead ends: 920481 [2021-12-06 20:37:16,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:37:16,241 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 953 mSDsluCounter, 2855 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 4145 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:16,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 4145 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:37:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920481 states. [2021-12-06 20:37:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920481 to 662574. [2021-12-06 20:37:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662574 states, 662573 states have (on average 1.65256205731293) internal successors, (1094943), 662573 states have internal predecessors, (1094943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662574 states to 662574 states and 1094943 transitions. [2021-12-06 20:37:31,899 INFO L78 Accepts]: Start accepts. Automaton has 662574 states and 1094943 transitions. Word has length 242 [2021-12-06 20:37:31,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:31,899 INFO L470 AbstractCegarLoop]: Abstraction has 662574 states and 1094943 transitions. [2021-12-06 20:37:31,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 662574 states and 1094943 transitions. [2021-12-06 20:37:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 20:37:31,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:31,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:37:31,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 20:37:31,902 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:37:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2091464427, now seen corresponding path program 1 times [2021-12-06 20:37:31,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:37:31,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087502940] [2021-12-06 20:37:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:37:31,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:37:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:37:32,085 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 20:37:32,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:37:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087502940] [2021-12-06 20:37:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087502940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:37:32,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:37:32,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:37:32,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011330251] [2021-12-06 20:37:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:37:32,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:37:32,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:37:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:37:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:37:32,087 INFO L87 Difference]: Start difference. First operand 662574 states and 1094943 transitions. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:37:42,746 INFO L93 Difference]: Finished difference Result 1324517 states and 2188786 transitions. [2021-12-06 20:37:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:37:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-06 20:37:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:37:43,853 INFO L225 Difference]: With dead ends: 1324517 [2021-12-06 20:37:43,853 INFO L226 Difference]: Without dead ends: 662576 [2021-12-06 20:37:44,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:37:44,281 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 552 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 7569 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:37:44,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 7569 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:37:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662576 states. [2021-12-06 20:37:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662576 to 662574. [2021-12-06 20:37:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662574 states, 662573 states have (on average 1.6478455958815104) internal successors, (1091818), 662573 states have internal predecessors, (1091818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662574 states to 662574 states and 1091818 transitions. [2021-12-06 20:37:58,496 INFO L78 Accepts]: Start accepts. Automaton has 662574 states and 1091818 transitions. Word has length 244 [2021-12-06 20:37:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:37:58,496 INFO L470 AbstractCegarLoop]: Abstraction has 662574 states and 1091818 transitions. [2021-12-06 20:37:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:37:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 662574 states and 1091818 transitions. [2021-12-06 20:37:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-06 20:37:58,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:37:58,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:37:58,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 20:37:58,499 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:37:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:37:58,500 INFO L85 PathProgramCache]: Analyzing trace with hash 224948069, now seen corresponding path program 1 times [2021-12-06 20:37:58,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:37:58,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232859817] [2021-12-06 20:37:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:37:58,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:37:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:37:58,654 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 20:37:58,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:37:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232859817] [2021-12-06 20:37:58,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232859817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:37:58,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:37:58,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:37:58,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463882084] [2021-12-06 20:37:58,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:37:58,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:37:58,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:37:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:37:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:37:58,657 INFO L87 Difference]: Start difference. First operand 662574 states and 1091818 transitions. Second operand has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:38:17,752 INFO L93 Difference]: Finished difference Result 1958777 states and 3229292 transitions. [2021-12-06 20:38:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:38:17,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-12-06 20:38:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:38:20,008 INFO L225 Difference]: With dead ends: 1958777 [2021-12-06 20:38:20,008 INFO L226 Difference]: Without dead ends: 1296836 [2021-12-06 20:38:20,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 20:38:20,306 INFO L933 BasicCegarLoop]: 1285 mSDtfsCounter, 814 mSDsluCounter, 5044 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 6329 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:38:20,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 6329 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:38:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296836 states. [2021-12-06 20:38:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296836 to 1296834. [2021-12-06 20:38:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296834 states, 1296833 states have (on average 1.641131124824862) internal successors, (2128273), 1296833 states have internal predecessors, (2128273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296834 states to 1296834 states and 2128273 transitions. [2021-12-06 20:38:50,214 INFO L78 Accepts]: Start accepts. Automaton has 1296834 states and 2128273 transitions. Word has length 247 [2021-12-06 20:38:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:38:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 1296834 states and 2128273 transitions. [2021-12-06 20:38:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.285714285714285) internal successors, (247), 7 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:38:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1296834 states and 2128273 transitions. [2021-12-06 20:38:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-06 20:38:50,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:38:50,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:38:50,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 20:38:50,216 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:38:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:38:50,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2050658028, now seen corresponding path program 1 times [2021-12-06 20:38:50,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:38:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124422724] [2021-12-06 20:38:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:38:50,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:38:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:38:50,444 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 20:38:50,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:38:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124422724] [2021-12-06 20:38:50,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124422724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:38:50,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:38:50,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:38:50,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709729429] [2021-12-06 20:38:50,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:38:50,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:38:50,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:38:50,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:38:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:38:50,445 INFO L87 Difference]: Start difference. First operand 1296834 states and 2128273 transitions. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:39:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:39:30,240 INFO L93 Difference]: Finished difference Result 2484277 states and 4052466 transitions. [2021-12-06 20:39:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:39:30,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-12-06 20:39:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:39:34,636 INFO L225 Difference]: With dead ends: 2484277 [2021-12-06 20:39:34,636 INFO L226 Difference]: Without dead ends: 2484275 [2021-12-06 20:39:35,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 20:39:35,141 INFO L933 BasicCegarLoop]: 1480 mSDtfsCounter, 2364 mSDsluCounter, 6794 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 8274 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:39:35,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 8274 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:39:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484275 states. [2021-12-06 20:40:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484275 to 1327008. [2021-12-06 20:40:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327008 states, 1327007 states have (on average 1.6264917969535955) internal successors, (2158366), 1327007 states have internal predecessors, (2158366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:40:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327008 states to 1327008 states and 2158366 transitions. [2021-12-06 20:40:15,825 INFO L78 Accepts]: Start accepts. Automaton has 1327008 states and 2158366 transitions. Word has length 248 [2021-12-06 20:40:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:40:15,825 INFO L470 AbstractCegarLoop]: Abstraction has 1327008 states and 2158366 transitions. [2021-12-06 20:40:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:40:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1327008 states and 2158366 transitions. [2021-12-06 20:40:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-06 20:40:15,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:40:15,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:40:15,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 20:40:15,837 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:40:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:40:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1980669697, now seen corresponding path program 1 times [2021-12-06 20:40:15,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:40:15,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426730821] [2021-12-06 20:40:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:40:15,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:40:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:40:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:40:15,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:40:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426730821] [2021-12-06 20:40:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426730821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:40:15,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:40:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:40:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719105656] [2021-12-06 20:40:15,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:40:15,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:40:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:40:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:40:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:40:15,932 INFO L87 Difference]: Start difference. First operand 1327008 states and 2158366 transitions. Second operand has 7 states, 7 states have (on average 42.42857142857143) internal successors, (297), 7 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)