./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y --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 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:46:49,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:46:49,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:46:49,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:46:49,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:46:49,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:46:49,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:46:49,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:46:49,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:46:49,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:46:49,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:46:49,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:46:49,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:46:49,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:46:49,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:46:49,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:46:49,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:46:49,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:46:49,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:46:49,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:46:49,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:46:49,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:46:49,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:46:49,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:46:49,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:46:49,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:46:49,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:46:49,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:46:49,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:46:49,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:46:49,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:46:49,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:46:49,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:46:49,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:46:49,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:46:49,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:46:49,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:46:49,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:46:49,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:46:49,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:46:49,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:46:49,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:46:49,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:46:49,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:46:49,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:46:49,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:46:49,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:46:49,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:46:49,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:46:49,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:46:49,603 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:46:49,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:46:49,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:46:49,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:46:49,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:46:49,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:46:49,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:46:49,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:46:49,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:46:49,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:46:49,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:46:49,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:46:49,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:46:49,607 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:46:49,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:46:49,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:46:49,608 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_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4253e0451be735529167e5ed681d73045b3b91eb0fb6b7736298c9e50c884adf [2021-11-13 17:46:49,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:46:49,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:46:49,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:46:49,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:46:49,900 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:46:49,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-11-13 17:46:49,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/data/e0aafbe2d/e8e133166d7041578f08b4bf4abc97b8/FLAG34b19d9f1 [2021-11-13 17:46:51,025 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:46:51,026 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/sv-benchmarks/c/eca-rers2012/Problem19_label28.c [2021-11-13 17:46:51,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/data/e0aafbe2d/e8e133166d7041578f08b4bf4abc97b8/FLAG34b19d9f1 [2021-11-13 17:46:51,463 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/data/e0aafbe2d/e8e133166d7041578f08b4bf4abc97b8 [2021-11-13 17:46:51,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:46:51,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:46:51,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:46:51,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:46:51,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:46:51,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:46:51" (1/1) ... [2021-11-13 17:46:51,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6a3bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:51, skipping insertion in model container [2021-11-13 17:46:51,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:46:51" (1/1) ... [2021-11-13 17:46:51,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:46:51,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:46:52,108 WARN L228 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_38180e9f-0cf2-4ddb-a395-3430f3480ff3/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-11-13 17:46:53,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:46:54,002 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:46:54,039 WARN L228 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_38180e9f-0cf2-4ddb-a395-3430f3480ff3/sv-benchmarks/c/eca-rers2012/Problem19_label28.c[3379,3392] [2021-11-13 17:46:55,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:46:55,276 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:46:55,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55 WrapperNode [2021-11-13 17:46:55,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:46:55,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:46:55,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:46:55,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:46:55,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:55,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:56,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:46:56,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:46:56,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:46:56,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:46:56,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:56,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:56,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:56,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:57,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:57,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:57,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:57,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:46:57,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:46:57,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:46:57,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:46:57,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (1/1) ... [2021-11-13 17:46:57,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:46:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:57,675 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:46:57,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:46:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:46:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:46:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:46:57,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:47:08,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:47:08,011 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:47:08,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:08 BoogieIcfgContainer [2021-11-13 17:47:08,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:47:08,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:47:08,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:47:08,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:47:08,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:46:51" (1/3) ... [2021-11-13 17:47:08,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633a5ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:08, skipping insertion in model container [2021-11-13 17:47:08,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:55" (2/3) ... [2021-11-13 17:47:08,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633a5ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:47:08, skipping insertion in model container [2021-11-13 17:47:08,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:47:08" (3/3) ... [2021-11-13 17:47:08,024 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label28.c [2021-11-13 17:47:08,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:47:08,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:47:08,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:47:08,100 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:47:08,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:47:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2021-11-13 17:47:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 17:47:08,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:08,155 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] [2021-11-13 17:47:08,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2021-11-13 17:47:08,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:08,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123387148] [2021-11-13 17:47:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:08,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:08,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:08,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123387148] [2021-11-13 17:47:08,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123387148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:08,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:08,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:47:08,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727309623] [2021-11-13 17:47:08,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:08,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:08,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:08,511 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2021-11-13 17:47:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:18,340 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-11-13 17:47:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:47:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 23 [2021-11-13 17:47:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:18,396 INFO L225 Difference]: With dead ends: 4957 [2021-11-13 17:47:18,396 INFO L226 Difference]: Without dead ends: 3129 [2021-11-13 17:47:18,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:47:18,415 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1603 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7947.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1603 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 67.81ms SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9442.54ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:18,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1603 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 67.81ms Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 9442.54ms Time] [2021-11-13 17:47:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-13 17:47:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-11-13 17:47:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 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) [2021-11-13 17:47:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-11-13 17:47:18,611 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 23 [2021-11-13 17:47:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:18,612 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-11-13 17:47:18,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2021-11-13 17:47:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-11-13 17:47:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 17:47:18,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:18,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:18,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:47:18,622 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1128031860, now seen corresponding path program 1 times [2021-11-13 17:47:18,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:18,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040111918] [2021-11-13 17:47:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:18,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:18,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040111918] [2021-11-13 17:47:18,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040111918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:18,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:18,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:18,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978116777] [2021-11-13 17:47:18,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:18,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:18,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:18,893 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-11-13 17:47:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:32,372 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2021-11-13 17:47:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2021-11-13 17:47:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:32,423 INFO L225 Difference]: With dead ends: 10359 [2021-11-13 17:47:32,423 INFO L226 Difference]: Without dead ends: 7253 [2021-11-13 17:47:32,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:32,431 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 4321 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11073.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 75.80ms SdHoareTripleChecker+Time, 1500 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13062.74ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:32,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 1292 Invalid, 11004 Unknown, 0 Unchecked, 75.80ms Time], IncrementalHoareTripleChecker [1500 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 13062.74ms Time] [2021-11-13 17:47:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2021-11-13 17:47:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2021-11-13 17:47:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 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) [2021-11-13 17:47:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2021-11-13 17:47:32,621 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 90 [2021-11-13 17:47:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2021-11-13 17:47:32,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-11-13 17:47:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2021-11-13 17:47:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-13 17:47:32,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:32,631 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 17:47:32,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:47:32,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash -813571766, now seen corresponding path program 1 times [2021-11-13 17:47:32,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:32,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898428621] [2021-11-13 17:47:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:32,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:47:33,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:33,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898428621] [2021-11-13 17:47:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898428621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:33,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:33,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:33,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770140246] [2021-11-13 17:47:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:33,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:33,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:33,114 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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) [2021-11-13 17:47:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:44,254 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2021-11-13 17:47:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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 297 [2021-11-13 17:47:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:44,315 INFO L225 Difference]: With dead ends: 17269 [2021-11-13 17:47:44,315 INFO L226 Difference]: Without dead ends: 11387 [2021-11-13 17:47:44,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:44,327 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9232.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.17ms SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10840.33ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:44,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2157 Invalid, 9886 Unknown, 0 Unchecked, 34.17ms Time], IncrementalHoareTripleChecker [431 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 10840.33ms Time] [2021-11-13 17:47:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2021-11-13 17:47:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2021-11-13 17:47:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 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) [2021-11-13 17:47:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2021-11-13 17:47:44,651 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 297 [2021-11-13 17:47:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:44,652 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2021-11-13 17:47:44,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 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) [2021-11-13 17:47:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2021-11-13 17:47:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-13 17:47:44,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:44,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 17:47:44,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:47:44,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1573993180, now seen corresponding path program 1 times [2021-11-13 17:47:44,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:44,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608663984] [2021-11-13 17:47:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:44,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:45,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:45,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608663984] [2021-11-13 17:47:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608663984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:45,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:45,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:47:45,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442845421] [2021-11-13 17:47:45,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:45,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:47:45,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:47:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:45,079 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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) [2021-11-13 17:47:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:53,514 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2021-11-13 17:47:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:47:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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 325 [2021-11-13 17:47:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:53,553 INFO L225 Difference]: With dead ends: 20033 [2021-11-13 17:47:53,553 INFO L226 Difference]: Without dead ends: 11367 [2021-11-13 17:47:53,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:47:53,564 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7060.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.65ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8237.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:53,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 27.65ms Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 8237.88ms Time] [2021-11-13 17:47:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2021-11-13 17:47:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2021-11-13 17:47:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 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) [2021-11-13 17:47:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2021-11-13 17:47:53,815 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 325 [2021-11-13 17:47:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:53,816 INFO L470 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2021-11-13 17:47:53,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 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) [2021-11-13 17:47:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2021-11-13 17:47:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-13 17:47:53,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:53,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:47:53,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:47:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1714499808, now seen corresponding path program 1 times [2021-11-13 17:47:53,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:53,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183744772] [2021-11-13 17:47:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:53,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:54,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183744772] [2021-11-13 17:47:54,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183744772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751778206] [2021-11-13 17:47:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:54,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:54,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:54,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:47:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:47:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 17:47:56,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:47:56,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751778206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:56,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:56,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-13 17:47:56,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236336941] [2021-11-13 17:47:56,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:47:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:47:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:47:56,174 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2021-11-13 17:48:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:02,728 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2021-11-13 17:48:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:02,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 510 [2021-11-13 17:48:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:02,773 INFO L225 Difference]: With dead ends: 24133 [2021-11-13 17:48:02,773 INFO L226 Difference]: Without dead ends: 15498 [2021-11-13 17:48:02,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:48:02,791 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5286.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.68ms SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6358.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:02,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 24.68ms Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 6358.89ms Time] [2021-11-13 17:48:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2021-11-13 17:48:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2021-11-13 17:48:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 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) [2021-11-13 17:48:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2021-11-13 17:48:03,080 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 510 [2021-11-13 17:48:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:03,082 INFO L470 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2021-11-13 17:48:03,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2021-11-13 17:48:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2021-11-13 17:48:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-11-13 17:48:03,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:03,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:03,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:03,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:03,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:03,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1054282805, now seen corresponding path program 1 times [2021-11-13 17:48:03,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:03,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665282555] [2021-11-13 17:48:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:03,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 63 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:03,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:03,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665282555] [2021-11-13 17:48:03,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665282555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:03,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605789179] [2021-11-13 17:48:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:03,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:03,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:03,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:48:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:05,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605789179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:05,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 17:48:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013969990] [2021-11-13 17:48:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:05,237 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2021-11-13 17:48:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:12,563 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2021-11-13 17:48:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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 579 [2021-11-13 17:48:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:12,618 INFO L225 Difference]: With dead ends: 40540 [2021-11-13 17:48:12,619 INFO L226 Difference]: Without dead ends: 27776 [2021-11-13 17:48:12,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:48:12,639 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5941.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.92ms SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7071.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 21.92ms Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 7071.12ms Time] [2021-11-13 17:48:12,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2021-11-13 17:48:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2021-11-13 17:48:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 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) [2021-11-13 17:48:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2021-11-13 17:48:13,142 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 579 [2021-11-13 17:48:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:13,143 INFO L470 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2021-11-13 17:48:13,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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) [2021-11-13 17:48:13,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2021-11-13 17:48:13,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-11-13 17:48:13,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:13,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:13,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:13,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 17:48:13,390 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1957660590, now seen corresponding path program 1 times [2021-11-13 17:48:13,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:13,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85007784] [2021-11-13 17:48:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:13,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-13 17:48:13,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:13,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85007784] [2021-11-13 17:48:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85007784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:13,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:13,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:48:13,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7570434] [2021-11-13 17:48:13,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:13,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:48:13,750 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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) [2021-11-13 17:48:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:20,176 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2021-11-13 17:48:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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 584 [2021-11-13 17:48:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:20,215 INFO L225 Difference]: With dead ends: 58285 [2021-11-13 17:48:20,216 INFO L226 Difference]: Without dead ends: 33245 [2021-11-13 17:48:20,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:48:20,236 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5113.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.38ms SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6141.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:20,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 21.38ms Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 6141.25ms Time] [2021-11-13 17:48:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2021-11-13 17:48:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2021-11-13 17:48:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 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) [2021-11-13 17:48:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2021-11-13 17:48:20,745 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 584 [2021-11-13 17:48:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2021-11-13 17:48:20,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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) [2021-11-13 17:48:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2021-11-13 17:48:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-11-13 17:48:20,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:20,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:20,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:48:20,755 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash -601971848, now seen corresponding path program 1 times [2021-11-13 17:48:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:20,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316483860] [2021-11-13 17:48:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 17:48:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:21,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316483860] [2021-11-13 17:48:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316483860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:21,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:21,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:48:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150694901] [2021-11-13 17:48:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:21,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:21,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:48:21,164 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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) [2021-11-13 17:48:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:28,646 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2021-11-13 17:48:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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 601 [2021-11-13 17:48:28,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:28,722 INFO L225 Difference]: With dead ends: 91260 [2021-11-13 17:48:28,723 INFO L226 Difference]: Without dead ends: 60757 [2021-11-13 17:48:28,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:48:28,946 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5947.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.51ms SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7082.24ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:28,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 22.51ms Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 7082.24ms Time] [2021-11-13 17:48:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2021-11-13 17:48:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2021-11-13 17:48:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 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) [2021-11-13 17:48:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2021-11-13 17:48:29,688 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 601 [2021-11-13 17:48:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:29,689 INFO L470 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2021-11-13 17:48:29,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 2 states have internal predecessors, (512), 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) [2021-11-13 17:48:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2021-11-13 17:48:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-11-13 17:48:29,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:29,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:29,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:48:29,700 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash 22569828, now seen corresponding path program 1 times [2021-11-13 17:48:29,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:29,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188516855] [2021-11-13 17:48:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:29,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:30,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:30,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188516855] [2021-11-13 17:48:30,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188516855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:30,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900796752] [2021-11-13 17:48:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:30,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:30,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:30,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:48:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:48:31,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:31,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900796752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:31,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:31,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-13 17:48:31,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360012431] [2021-11-13 17:48:31,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:31,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:31,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:31,851 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-11-13 17:48:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:38,704 INFO L93 Difference]: Finished difference Result 110553 states and 129119 transitions. [2021-11-13 17:48:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 717 [2021-11-13 17:48:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:38,803 INFO L225 Difference]: With dead ends: 110553 [2021-11-13 17:48:38,803 INFO L226 Difference]: Without dead ends: 58009 [2021-11-13 17:48:38,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:38,838 INFO L933 BasicCegarLoop]: 2903 mSDtfsCounter, 1583 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5206.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.83ms SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6374.47ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:38,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 3085 Invalid, 5144 Unknown, 0 Unchecked, 22.83ms Time], IncrementalHoareTripleChecker [1466 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 6374.47ms Time] [2021-11-13 17:48:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58009 states. [2021-11-13 17:48:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58009 to 58003. [2021-11-13 17:48:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58003 states, 58002 states have (on average 1.116909761732354) internal successors, (64783), 58002 states have internal predecessors, (64783), 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) [2021-11-13 17:48:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 64783 transitions. [2021-11-13 17:48:39,758 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 64783 transitions. Word has length 717 [2021-11-13 17:48:39,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:39,759 INFO L470 AbstractCegarLoop]: Abstraction has 58003 states and 64783 transitions. [2021-11-13 17:48:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-11-13 17:48:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 64783 transitions. [2021-11-13 17:48:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2021-11-13 17:48:39,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:39,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:39,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:39,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:39,986 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1861895486, now seen corresponding path program 1 times [2021-11-13 17:48:39,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:39,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740898466] [2021-11-13 17:48:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:39,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:40,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:40,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740898466] [2021-11-13 17:48:40,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740898466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:40,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631267117] [2021-11-13 17:48:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:40,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:40,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:40,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:48:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:48:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-13 17:48:42,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:48:42,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631267117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:42,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:48:42,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-13 17:48:42,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270888935] [2021-11-13 17:48:42,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:42,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:48:42,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:48:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:42,505 INFO L87 Difference]: Start difference. First operand 58003 states and 64783 transitions. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-11-13 17:48:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:50,636 INFO L93 Difference]: Finished difference Result 129686 states and 145981 transitions. [2021-11-13 17:48:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:48:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 729 [2021-11-13 17:48:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:50,719 INFO L225 Difference]: With dead ends: 129686 [2021-11-13 17:48:50,719 INFO L226 Difference]: Without dead ends: 74415 [2021-11-13 17:48:50,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:48:50,754 INFO L933 BasicCegarLoop]: 1314 mSDtfsCounter, 1582 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6547.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 5637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.25ms SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7659.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:50,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 1438 Invalid, 5637 Unknown, 0 Unchecked, 23.25ms Time], IncrementalHoareTripleChecker [723 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 7659.69ms Time] [2021-11-13 17:48:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74415 states. [2021-11-13 17:48:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74415 to 70304. [2021-11-13 17:48:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70304 states, 70303 states have (on average 1.1228681564086882) internal successors, (78941), 70303 states have internal predecessors, (78941), 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) [2021-11-13 17:48:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70304 states to 70304 states and 78941 transitions. [2021-11-13 17:48:51,906 INFO L78 Accepts]: Start accepts. Automaton has 70304 states and 78941 transitions. Word has length 729 [2021-11-13 17:48:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:51,907 INFO L470 AbstractCegarLoop]: Abstraction has 70304 states and 78941 transitions. [2021-11-13 17:48:51,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2021-11-13 17:48:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 70304 states and 78941 transitions. [2021-11-13 17:48:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2021-11-13 17:48:51,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:51,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:51,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:52,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38180e9f-0cf2-4ddb-a395-3430f3480ff3/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:52,145 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:48:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2144527646, now seen corresponding path program 1 times [2021-11-13 17:48:52,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:52,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12665849] [2021-11-13 17:48:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:52,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:48:52,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:52,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12665849] [2021-11-13 17:48:52,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12665849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:48:52,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:48:52,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:48:52,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034516314] [2021-11-13 17:48:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:48:52,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:48:52,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:52,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:48:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:48:52,917 INFO L87 Difference]: Start difference. First operand 70304 states and 78941 transitions. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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) [2021-11-13 17:49:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:07,426 INFO L93 Difference]: Finished difference Result 226802 states and 258051 transitions. [2021-11-13 17:49:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:49:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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 807 [2021-11-13 17:49:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:07,644 INFO L225 Difference]: With dead ends: 226802 [2021-11-13 17:49:07,644 INFO L226 Difference]: Without dead ends: 159230 [2021-11-13 17:49:07,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:07,687 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 3320 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 8807 mSolverCounterSat, 2932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11354.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 11739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.86ms SdHoareTripleChecker+Time, 2932 IncrementalHoareTripleChecker+Valid, 8807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13643.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:07,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3320 Valid, 1232 Invalid, 11739 Unknown, 0 Unchecked, 42.86ms Time], IncrementalHoareTripleChecker [2932 Valid, 8807 Invalid, 0 Unknown, 0 Unchecked, 13643.46ms Time] [2021-11-13 17:49:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159230 states. [2021-11-13 17:49:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159230 to 152298. [2021-11-13 17:49:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152298 states, 152297 states have (on average 1.1156555940038215) internal successors, (169911), 152297 states have internal predecessors, (169911), 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) [2021-11-13 17:49:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152298 states to 152298 states and 169911 transitions. [2021-11-13 17:49:10,311 INFO L78 Accepts]: Start accepts. Automaton has 152298 states and 169911 transitions. Word has length 807 [2021-11-13 17:49:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 152298 states and 169911 transitions. [2021-11-13 17:49:10,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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) [2021-11-13 17:49:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 152298 states and 169911 transitions. [2021-11-13 17:49:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2021-11-13 17:49:10,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:10,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:10,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:49:10,327 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -27186972, now seen corresponding path program 1 times [2021-11-13 17:49:10,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:10,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421443438] [2021-11-13 17:49:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:10,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 17:49:10,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:10,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421443438] [2021-11-13 17:49:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421443438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:10,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:10,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857133644] [2021-11-13 17:49:10,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:10,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:49:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:49:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:49:10,986 INFO L87 Difference]: Start difference. First operand 152298 states and 169911 transitions. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2021-11-13 17:49:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:21,611 INFO L93 Difference]: Finished difference Result 379736 states and 426212 transitions. [2021-11-13 17:49:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:49:21,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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 883 [2021-11-13 17:49:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:21,981 INFO L225 Difference]: With dead ends: 379736 [2021-11-13 17:49:21,981 INFO L226 Difference]: Without dead ends: 230170 [2021-11-13 17:49:22,054 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 [2021-11-13 17:49:22,056 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 1717 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 2343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7563.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 6575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.15ms SdHoareTripleChecker+Time, 2343 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9109.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:22,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 599 Invalid, 6575 Unknown, 0 Unchecked, 31.15ms Time], IncrementalHoareTripleChecker [2343 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 9109.75ms Time] [2021-11-13 17:49:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230170 states. [2021-11-13 17:49:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230170 to 209596. [2021-11-13 17:49:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209596 states, 209595 states have (on average 1.1301032944488179) internal successors, (236864), 209595 states have internal predecessors, (236864), 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) [2021-11-13 17:49:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209596 states to 209596 states and 236864 transitions. [2021-11-13 17:49:26,301 INFO L78 Accepts]: Start accepts. Automaton has 209596 states and 236864 transitions. Word has length 883 [2021-11-13 17:49:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:26,302 INFO L470 AbstractCegarLoop]: Abstraction has 209596 states and 236864 transitions. [2021-11-13 17:49:26,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2021-11-13 17:49:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 209596 states and 236864 transitions. [2021-11-13 17:49:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1019 [2021-11-13 17:49:26,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:26,354 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:26,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:49:26,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1583601661, now seen corresponding path program 1 times [2021-11-13 17:49:26,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:26,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536097901] [2021-11-13 17:49:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:26,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 580 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-13 17:49:27,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:27,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536097901] [2021-11-13 17:49:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536097901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:27,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:27,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582144602] [2021-11-13 17:49:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:27,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:49:27,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:49:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:49:27,086 INFO L87 Difference]: Start difference. First operand 209596 states and 236864 transitions. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2021-11-13 17:49:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:38,543 INFO L93 Difference]: Finished difference Result 505232 states and 576386 transitions. [2021-11-13 17:49:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:49:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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 1018 [2021-11-13 17:49:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:39,024 INFO L225 Difference]: With dead ends: 505232 [2021-11-13 17:49:39,024 INFO L226 Difference]: Without dead ends: 298368 [2021-11-13 17:49:39,132 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 [2021-11-13 17:49:39,134 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 1661 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 4413 mSolverCounterSat, 1547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7826.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.81ms SdHoareTripleChecker+Time, 1547 IncrementalHoareTripleChecker+Valid, 4413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9212.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:39,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1661 Valid, 1155 Invalid, 5960 Unknown, 0 Unchecked, 29.81ms Time], IncrementalHoareTripleChecker [1547 Valid, 4413 Invalid, 0 Unknown, 0 Unchecked, 9212.55ms Time] [2021-11-13 17:49:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298368 states. [2021-11-13 17:49:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298368 to 287442. [2021-11-13 17:49:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287442 states, 287441 states have (on average 1.1323993445611447) internal successors, (325498), 287441 states have internal predecessors, (325498), 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) [2021-11-13 17:49:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287442 states to 287442 states and 325498 transitions. [2021-11-13 17:49:44,051 INFO L78 Accepts]: Start accepts. Automaton has 287442 states and 325498 transitions. Word has length 1018 [2021-11-13 17:49:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 287442 states and 325498 transitions. [2021-11-13 17:49:44,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2021-11-13 17:49:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 287442 states and 325498 transitions. [2021-11-13 17:49:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1121 [2021-11-13 17:49:44,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:44,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:49:44,833 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1318721559, now seen corresponding path program 1 times [2021-11-13 17:49:44,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:44,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34500837] [2021-11-13 17:49:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:44,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-13 17:49:45,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:45,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34500837] [2021-11-13 17:49:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34500837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:45,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:45,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:45,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112538612] [2021-11-13 17:49:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:45,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:49:45,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:49:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:49:45,594 INFO L87 Difference]: Start difference. First operand 287442 states and 325498 transitions. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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) [2021-11-13 17:49:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:57,630 INFO L93 Difference]: Finished difference Result 675981 states and 765421 transitions. [2021-11-13 17:49:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:49:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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 1120 [2021-11-13 17:49:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:58,859 INFO L225 Difference]: With dead ends: 675981 [2021-11-13 17:49:58,859 INFO L226 Difference]: Without dead ends: 388540 [2021-11-13 17:49:58,979 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 [2021-11-13 17:49:58,980 INFO L933 BasicCegarLoop]: 2983 mSDtfsCounter, 1373 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 4933 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8178.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 5842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.20ms SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 4933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9595.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:58,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 3148 Invalid, 5842 Unknown, 0 Unchecked, 33.20ms Time], IncrementalHoareTripleChecker [909 Valid, 4933 Invalid, 0 Unknown, 0 Unchecked, 9595.45ms Time] [2021-11-13 17:49:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388540 states. [2021-11-13 17:50:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388540 to 384371. [2021-11-13 17:50:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384371 states, 384370 states have (on average 1.1100398053958425) internal successors, (426666), 384370 states have internal predecessors, (426666), 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) [2021-11-13 17:50:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384371 states to 384371 states and 426666 transitions. [2021-11-13 17:50:06,056 INFO L78 Accepts]: Start accepts. Automaton has 384371 states and 426666 transitions. Word has length 1120 [2021-11-13 17:50:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:06,057 INFO L470 AbstractCegarLoop]: Abstraction has 384371 states and 426666 transitions. [2021-11-13 17:50:06,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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) [2021-11-13 17:50:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 384371 states and 426666 transitions. [2021-11-13 17:50:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2021-11-13 17:50:06,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:06,089 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:06,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:50:06,089 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1305599590, now seen corresponding path program 1 times [2021-11-13 17:50:06,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:06,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24059310] [2021-11-13 17:50:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:06,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 810 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-13 17:50:06,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:06,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24059310] [2021-11-13 17:50:06,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24059310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:50:06,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:50:06,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:50:06,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005144844] [2021-11-13 17:50:06,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:50:06,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:50:06,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:50:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:50:06,699 INFO L87 Difference]: Start difference. First operand 384371 states and 426666 transitions. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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)