./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0 --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 c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:55:33,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:55:33,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:55:33,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:55:33,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:55:33,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:55:33,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:55:33,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:55:33,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:55:33,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:55:33,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:55:33,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:55:33,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:55:33,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:55:33,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:55:33,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:55:33,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:55:33,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:55:33,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:55:33,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:55:33,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:55:33,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:55:33,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:55:33,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:55:33,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:55:33,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:55:33,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:55:33,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:55:33,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:55:33,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:55:33,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:55:33,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:55:33,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:55:33,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:55:33,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:55:33,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:55:33,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:55:33,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:55:33,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:55:33,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:55:33,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:55:33,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:55:33,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:55:33,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:55:33,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:55:33,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:55:33,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:55:33,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:55:33,425 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:55:33,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:55:33,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:55:33,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:55:33,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:55:33,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:55:33,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:55:33,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:55:33,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:55:33,427 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:55:33,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:55:33,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:55:33,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:55:33,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:55:33,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:55:33,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:55:33,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:55:33,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:55:33,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:55:33,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:55:33,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:55:33,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:55:33,438 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:55:33,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:55:33,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:55:33,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:55:33,441 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_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c727ce378f9c6151587faf5638863d5f3634ffe42c74bcfcd0e6318a1faa4f2e [2021-11-22 14:55:33,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:55:33,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:55:33,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:55:33,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:55:33,872 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:55:33,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-22 14:55:33,977 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/data/5a776a86e/7820557a966f4002be452411c48c6e0b/FLAGcc90e56a4 [2021-11-22 14:55:34,996 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:55:34,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2021-11-22 14:55:35,044 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/data/5a776a86e/7820557a966f4002be452411c48c6e0b/FLAGcc90e56a4 [2021-11-22 14:55:35,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/data/5a776a86e/7820557a966f4002be452411c48c6e0b [2021-11-22 14:55:35,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:55:35,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:55:35,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:55:35,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:55:35,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:55:35,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:55:35" (1/1) ... [2021-11-22 14:55:35,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b489fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:35, skipping insertion in model container [2021-11-22 14:55:35,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:55:35" (1/1) ... [2021-11-22 14:55:35,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:55:35,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:55:36,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-22 14:55:37,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:55:37,566 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:55:37,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2021-11-22 14:55:38,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:55:38,623 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:55:38,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38 WrapperNode [2021-11-22 14:55:38,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:55:38,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:55:38,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:55:38,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:55:38,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:38,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:39,526 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-22 14:55:39,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:55:39,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:55:39,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:55:39,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:55:39,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:39,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:39,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:39,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:40,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:40,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:40,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:40,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:55:40,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:55:40,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:55:40,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:55:40,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (1/1) ... [2021-11-22 14:55:40,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:55:40,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:55:40,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:55:40,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:55:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:55:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:55:40,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:55:40,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:55:40,739 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:55:40,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:55:47,162 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:55:47,186 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:55:47,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:55:47,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:55:47 BoogieIcfgContainer [2021-11-22 14:55:47,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:55:47,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:55:47,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:55:47,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:55:47,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:55:35" (1/3) ... [2021-11-22 14:55:47,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c0a07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:55:47, skipping insertion in model container [2021-11-22 14:55:47,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:55:38" (2/3) ... [2021-11-22 14:55:47,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c0a07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:55:47, skipping insertion in model container [2021-11-22 14:55:47,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:55:47" (3/3) ... [2021-11-22 14:55:47,201 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2021-11-22 14:55:47,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:55:47,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:55:47,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:55:47,280 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 [2021-11-22 14:55:47,280 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:55:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-11-22 14:55:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 14:55:47,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:55:47,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:55:47,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:55:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:55:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2158734, now seen corresponding path program 1 times [2021-11-22 14:55:47,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:55:47,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448130716] [2021-11-22 14:55:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:55:47,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:55:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:55:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:55:47,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:55:47,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448130716] [2021-11-22 14:55:47,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448130716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:55:47,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:55:47,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:55:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896839409] [2021-11-22 14:55:47,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:55:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:55:47,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:55:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:55:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:55:47,833 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-22 14:55:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:55:54,335 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-11-22 14:55:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:55:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-22 14:55:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:55:54,370 INFO L225 Difference]: With dead ends: 3082 [2021-11-22 14:55:54,371 INFO L226 Difference]: Without dead ends: 1899 [2021-11-22 14:55:54,382 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 [2021-11-22 14:55:54,387 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 983 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:55:54,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-22 14:55:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-22 14:55:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-11-22 14:55:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 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) [2021-11-22 14:55:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-11-22 14:55:54,562 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 56 [2021-11-22 14:55:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:55:54,564 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-11-22 14:55:54,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-22 14:55:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-11-22 14:55:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-22 14:55:54,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:55:54,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:55:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:55:54,579 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:55:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:55:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2024645466, now seen corresponding path program 1 times [2021-11-22 14:55:54,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:55:54,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169029688] [2021-11-22 14:55:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:55:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:55:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:55:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:55:54,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:55:54,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169029688] [2021-11-22 14:55:54,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169029688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:55:54,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:55:54,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:55:54,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36267496] [2021-11-22 14:55:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:55:54,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:55:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:55:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:55:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:55:54,841 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-11-22 14:56:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:00,540 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2021-11-22 14:56:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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 121 [2021-11-22 14:56:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:00,590 INFO L225 Difference]: With dead ends: 5384 [2021-11-22 14:56:00,596 INFO L226 Difference]: Without dead ends: 3492 [2021-11-22 14:56:00,610 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 [2021-11-22 14:56:00,612 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:00,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-22 14:56:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-11-22 14:56:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2021-11-22 14:56:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 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) [2021-11-22 14:56:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2021-11-22 14:56:00,727 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 121 [2021-11-22 14:56:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2021-11-22 14:56:00,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2021-11-22 14:56:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2021-11-22 14:56:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-22 14:56:00,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:00,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:56:00,743 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1368710357, now seen corresponding path program 1 times [2021-11-22 14:56:00,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:00,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877191549] [2021-11-22 14:56:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:00,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:56:00,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877191549] [2021-11-22 14:56:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877191549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:00,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:00,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:56:00,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841712810] [2021-11-22 14:56:00,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:00,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:00,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:00,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:00,963 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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) [2021-11-22 14:56:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:05,394 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2021-11-22 14:56:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 123 [2021-11-22 14:56:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:05,441 INFO L225 Difference]: With dead ends: 10169 [2021-11-22 14:56:05,442 INFO L226 Difference]: Without dead ends: 6680 [2021-11-22 14:56:05,449 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 [2021-11-22 14:56:05,450 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:05,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-22 14:56:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2021-11-22 14:56:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2021-11-22 14:56:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 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) [2021-11-22 14:56:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2021-11-22 14:56:05,642 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 123 [2021-11-22 14:56:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:05,645 INFO L470 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2021-11-22 14:56:05,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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) [2021-11-22 14:56:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2021-11-22 14:56:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-22 14:56:05,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:05,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 14:56:05,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:56:05,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1275120761, now seen corresponding path program 1 times [2021-11-22 14:56:05,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:05,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314387963] [2021-11-22 14:56:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:05,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:56:05,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314387963] [2021-11-22 14:56:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314387963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:05,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:56:05,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891865047] [2021-11-22 14:56:05,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:05,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:05,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:05,914 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-11-22 14:56:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:09,278 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2021-11-22 14:56:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 167 [2021-11-22 14:56:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:09,317 INFO L225 Difference]: With dead ends: 14123 [2021-11-22 14:56:09,318 INFO L226 Difference]: Without dead ends: 7456 [2021-11-22 14:56:09,326 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 [2021-11-22 14:56:09,327 INFO L933 BasicCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-22 14:56:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-11-22 14:56:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2021-11-22 14:56:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 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) [2021-11-22 14:56:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2021-11-22 14:56:09,497 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 167 [2021-11-22 14:56:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2021-11-22 14:56:09,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-11-22 14:56:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2021-11-22 14:56:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-22 14:56:09,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:09,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 14:56:09,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:56:09,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1023420253, now seen corresponding path program 1 times [2021-11-22 14:56:09,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:09,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506894652] [2021-11-22 14:56:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:09,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:56:09,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:09,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506894652] [2021-11-22 14:56:09,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506894652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:09,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:09,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:09,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219248019] [2021-11-22 14:56:09,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:09,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:56:09,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:56:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:56:09,677 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-11-22 14:56:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:17,281 INFO L93 Difference]: Finished difference Result 26116 states and 35959 transitions. [2021-11-22 14:56:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:56:17,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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 181 [2021-11-22 14:56:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:17,356 INFO L225 Difference]: With dead ends: 26116 [2021-11-22 14:56:17,357 INFO L226 Difference]: Without dead ends: 19449 [2021-11-22 14:56:17,366 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 [2021-11-22 14:56:17,367 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 1630 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 7397 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 8037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 7397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:17,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1630 Valid, 1187 Invalid, 8037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 7397 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-22 14:56:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19449 states. [2021-11-22 14:56:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19449 to 19303. [2021-11-22 14:56:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2778468552481608) internal successors, (24665), 19302 states have internal predecessors, (24665), 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) [2021-11-22 14:56:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24665 transitions. [2021-11-22 14:56:17,772 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24665 transitions. Word has length 181 [2021-11-22 14:56:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:17,773 INFO L470 AbstractCegarLoop]: Abstraction has 19303 states and 24665 transitions. [2021-11-22 14:56:17,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 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) [2021-11-22 14:56:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24665 transitions. [2021-11-22 14:56:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-22 14:56:17,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:17,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:17,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:56:17,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1740885801, now seen corresponding path program 1 times [2021-11-22 14:56:17,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213402107] [2021-11-22 14:56:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:17,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-22 14:56:17,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213402107] [2021-11-22 14:56:17,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213402107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:17,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:17,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:56:17,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809993755] [2021-11-22 14:56:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:17,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:17,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:17,989 INFO L87 Difference]: Start difference. First operand 19303 states and 24665 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-11-22 14:56:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:21,468 INFO L93 Difference]: Finished difference Result 33881 states and 44171 transitions. [2021-11-22 14:56:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 268 [2021-11-22 14:56:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:21,508 INFO L225 Difference]: With dead ends: 33881 [2021-11-22 14:56:21,508 INFO L226 Difference]: Without dead ends: 19312 [2021-11-22 14:56:21,525 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 [2021-11-22 14:56:21,526 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 728 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:21,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1212 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 14:56:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2021-11-22 14:56:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 19303. [2021-11-22 14:56:21,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19303 states, 19302 states have (on average 1.2765516526784788) internal successors, (24640), 19302 states have internal predecessors, (24640), 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) [2021-11-22 14:56:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19303 states to 19303 states and 24640 transitions. [2021-11-22 14:56:21,856 INFO L78 Accepts]: Start accepts. Automaton has 19303 states and 24640 transitions. Word has length 268 [2021-11-22 14:56:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:21,857 INFO L470 AbstractCegarLoop]: Abstraction has 19303 states and 24640 transitions. [2021-11-22 14:56:21,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-11-22 14:56:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19303 states and 24640 transitions. [2021-11-22 14:56:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-22 14:56:21,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:21,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:21,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:56:21,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2013422099, now seen corresponding path program 1 times [2021-11-22 14:56:21,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:21,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483746825] [2021-11-22 14:56:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:21,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:56:22,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483746825] [2021-11-22 14:56:22,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483746825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:22,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:22,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:22,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673935437] [2021-11-22 14:56:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:22,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:22,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:22,009 INFO L87 Difference]: Start difference. First operand 19303 states and 24640 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-11-22 14:56:26,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:26,230 INFO L93 Difference]: Finished difference Result 51975 states and 67214 transitions. [2021-11-22 14:56:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 270 [2021-11-22 14:56:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:26,306 INFO L225 Difference]: With dead ends: 51975 [2021-11-22 14:56:26,307 INFO L226 Difference]: Without dead ends: 32674 [2021-11-22 14:56:26,331 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 [2021-11-22 14:56:26,335 INFO L933 BasicCegarLoop]: 1854 mSDtfsCounter, 842 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:26,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 1994 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-22 14:56:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32674 states. [2021-11-22 14:56:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32674 to 31090. [2021-11-22 14:56:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31090 states, 31089 states have (on average 1.2295667277815305) internal successors, (38226), 31089 states have internal predecessors, (38226), 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) [2021-11-22 14:56:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31090 states to 31090 states and 38226 transitions. [2021-11-22 14:56:26,797 INFO L78 Accepts]: Start accepts. Automaton has 31090 states and 38226 transitions. Word has length 270 [2021-11-22 14:56:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:26,798 INFO L470 AbstractCegarLoop]: Abstraction has 31090 states and 38226 transitions. [2021-11-22 14:56:26,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-11-22 14:56:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 31090 states and 38226 transitions. [2021-11-22 14:56:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-22 14:56:26,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:26,805 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-22 14:56:26,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:56:26,806 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1544530878, now seen corresponding path program 1 times [2021-11-22 14:56:26,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862457801] [2021-11-22 14:56:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:26,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-22 14:56:26,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862457801] [2021-11-22 14:56:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862457801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:26,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:26,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:26,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569462740] [2021-11-22 14:56:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:26,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:26,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:26,951 INFO L87 Difference]: Start difference. First operand 31090 states and 38226 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:31,089 INFO L93 Difference]: Finished difference Result 85799 states and 106634 transitions. [2021-11-22 14:56:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 292 [2021-11-22 14:56:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:31,187 INFO L225 Difference]: With dead ends: 85799 [2021-11-22 14:56:31,187 INFO L226 Difference]: Without dead ends: 55498 [2021-11-22 14:56:31,212 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 [2021-11-22 14:56:31,213 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 883 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:31,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 902 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-22 14:56:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55498 states. [2021-11-22 14:56:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55498 to 54701. [2021-11-22 14:56:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54701 states, 54700 states have (on average 1.186764168190128) internal successors, (64916), 54700 states have internal predecessors, (64916), 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) [2021-11-22 14:56:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54701 states to 54701 states and 64916 transitions. [2021-11-22 14:56:31,937 INFO L78 Accepts]: Start accepts. Automaton has 54701 states and 64916 transitions. Word has length 292 [2021-11-22 14:56:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:31,938 INFO L470 AbstractCegarLoop]: Abstraction has 54701 states and 64916 transitions. [2021-11-22 14:56:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:56:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 54701 states and 64916 transitions. [2021-11-22 14:56:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-22 14:56:31,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:31,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:56:31,948 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1243297026, now seen corresponding path program 1 times [2021-11-22 14:56:31,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395944849] [2021-11-22 14:56:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:31,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 14:56:32,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:32,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395944849] [2021-11-22 14:56:32,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395944849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:32,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:32,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:32,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833590187] [2021-11-22 14:56:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:32,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:32,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:32,122 INFO L87 Difference]: Start difference. First operand 54701 states and 64916 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-11-22 14:56:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:36,642 INFO L93 Difference]: Finished difference Result 129084 states and 155214 transitions. [2021-11-22 14:56:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 347 [2021-11-22 14:56:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:36,736 INFO L225 Difference]: With dead ends: 129084 [2021-11-22 14:56:36,736 INFO L226 Difference]: Without dead ends: 75172 [2021-11-22 14:56:36,775 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 [2021-11-22 14:56:36,778 INFO L933 BasicCegarLoop]: 1815 mSDtfsCounter, 805 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:36,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 1959 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2557 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-22 14:56:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75172 states. [2021-11-22 14:56:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75172 to 74380. [2021-11-22 14:56:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74380 states, 74379 states have (on average 1.1514271501364632) internal successors, (85642), 74379 states have internal predecessors, (85642), 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) [2021-11-22 14:56:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74380 states to 74380 states and 85642 transitions. [2021-11-22 14:56:38,332 INFO L78 Accepts]: Start accepts. Automaton has 74380 states and 85642 transitions. Word has length 347 [2021-11-22 14:56:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:38,332 INFO L470 AbstractCegarLoop]: Abstraction has 74380 states and 85642 transitions. [2021-11-22 14:56:38,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2021-11-22 14:56:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 74380 states and 85642 transitions. [2021-11-22 14:56:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-22 14:56:38,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:38,345 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-22 14:56:38,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:56:38,345 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash 652420715, now seen corresponding path program 1 times [2021-11-22 14:56:38,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302203222] [2021-11-22 14:56:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:38,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 236 proven. 113 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-22 14:56:38,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:38,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302203222] [2021-11-22 14:56:38,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302203222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:56:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690713251] [2021-11-22 14:56:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:38,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:56:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:56:38,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:56:39,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:56:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:56:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:56:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-22 14:56:39,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:56:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690713251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:39,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:56:39,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-22 14:56:39,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553289227] [2021-11-22 14:56:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:39,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:56:39,879 INFO L87 Difference]: Start difference. First operand 74380 states and 85642 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-11-22 14:56:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:43,770 INFO L93 Difference]: Finished difference Result 147962 states and 170482 transitions. [2021-11-22 14:56:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 362 [2021-11-22 14:56:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:43,859 INFO L225 Difference]: With dead ends: 147962 [2021-11-22 14:56:43,859 INFO L226 Difference]: Without dead ends: 74371 [2021-11-22 14:56:43,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:56:43,886 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 1078 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:43,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 817 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 14:56:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74371 states. [2021-11-22 14:56:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74371 to 74370. [2021-11-22 14:56:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74370 states, 74369 states have (on average 1.1130847530557086) internal successors, (82779), 74369 states have internal predecessors, (82779), 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) [2021-11-22 14:56:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74370 states to 74370 states and 82779 transitions. [2021-11-22 14:56:45,043 INFO L78 Accepts]: Start accepts. Automaton has 74370 states and 82779 transitions. Word has length 362 [2021-11-22 14:56:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:45,044 INFO L470 AbstractCegarLoop]: Abstraction has 74370 states and 82779 transitions. [2021-11-22 14:56:45,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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) [2021-11-22 14:56:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 74370 states and 82779 transitions. [2021-11-22 14:56:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-11-22 14:56:45,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:45,061 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:45,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:56:45,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:56:45,288 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash 315445644, now seen corresponding path program 1 times [2021-11-22 14:56:45,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:45,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56919719] [2021-11-22 14:56:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:45,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-22 14:56:45,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:45,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56919719] [2021-11-22 14:56:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56919719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:45,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:45,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:45,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603782472] [2021-11-22 14:56:45,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:45,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:56:45,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:56:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:45,728 INFO L87 Difference]: Start difference. First operand 74370 states and 82779 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-11-22 14:56:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:49,681 INFO L93 Difference]: Finished difference Result 145587 states and 162051 transitions. [2021-11-22 14:56:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:56:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 381 [2021-11-22 14:56:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:49,768 INFO L225 Difference]: With dead ends: 145587 [2021-11-22 14:56:49,769 INFO L226 Difference]: Without dead ends: 72006 [2021-11-22 14:56:49,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:56:49,797 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1146 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:49,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1421 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-22 14:56:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72006 states. [2021-11-22 14:56:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72006 to 72005. [2021-11-22 14:56:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72005 states, 72004 states have (on average 1.0866618521193268) internal successors, (78244), 72004 states have internal predecessors, (78244), 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) [2021-11-22 14:56:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72005 states to 72005 states and 78244 transitions. [2021-11-22 14:56:50,983 INFO L78 Accepts]: Start accepts. Automaton has 72005 states and 78244 transitions. Word has length 381 [2021-11-22 14:56:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:56:50,985 INFO L470 AbstractCegarLoop]: Abstraction has 72005 states and 78244 transitions. [2021-11-22 14:56:50,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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) [2021-11-22 14:56:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 72005 states and 78244 transitions. [2021-11-22 14:56:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-22 14:56:50,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:56:50,994 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:56:50,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:56:50,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:56:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:56:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -718507191, now seen corresponding path program 1 times [2021-11-22 14:56:50,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:56:50,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985458283] [2021-11-22 14:56:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:56:50,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:56:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:56:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-22 14:56:51,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:56:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985458283] [2021-11-22 14:56:51,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985458283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:56:51,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:56:51,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:56:51,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450581547] [2021-11-22 14:56:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:56:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:56:51,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:56:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:56:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:56:51,154 INFO L87 Difference]: Start difference. First operand 72005 states and 78244 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-11-22 14:56:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:56:59,593 INFO L93 Difference]: Finished difference Result 195375 states and 213138 transitions. [2021-11-22 14:56:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:56:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 404 [2021-11-22 14:56:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:56:59,744 INFO L225 Difference]: With dead ends: 195375 [2021-11-22 14:56:59,745 INFO L226 Difference]: Without dead ends: 124159 [2021-11-22 14:56:59,780 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 [2021-11-22 14:56:59,781 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 1709 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 6634 mSolverCounterSat, 1038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 7672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1038 IncrementalHoareTripleChecker+Valid, 6634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:56:59,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 795 Invalid, 7672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1038 Valid, 6634 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-22 14:56:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124159 states. [2021-11-22 14:57:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124159 to 121667. [2021-11-22 14:57:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121667 states, 121666 states have (on average 1.084608682787303) internal successors, (131960), 121666 states have internal predecessors, (131960), 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) [2021-11-22 14:57:01,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121667 states to 121667 states and 131960 transitions. [2021-11-22 14:57:01,390 INFO L78 Accepts]: Start accepts. Automaton has 121667 states and 131960 transitions. Word has length 404 [2021-11-22 14:57:01,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:01,391 INFO L470 AbstractCegarLoop]: Abstraction has 121667 states and 131960 transitions. [2021-11-22 14:57:01,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-11-22 14:57:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 121667 states and 131960 transitions. [2021-11-22 14:57:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-22 14:57:01,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:01,404 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:01,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:57:01,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:01,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2122716563, now seen corresponding path program 1 times [2021-11-22 14:57:01,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152392728] [2021-11-22 14:57:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:01,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-22 14:57:02,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:02,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152392728] [2021-11-22 14:57:02,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152392728] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:02,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:02,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:57:02,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747315611] [2021-11-22 14:57:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:02,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:57:02,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:57:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:57:02,029 INFO L87 Difference]: Start difference. First operand 121667 states and 131960 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-11-22 14:57:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:06,796 INFO L93 Difference]: Finished difference Result 274840 states and 297848 transitions. [2021-11-22 14:57:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:57:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 437 [2021-11-22 14:57:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:06,978 INFO L225 Difference]: With dead ends: 274840 [2021-11-22 14:57:06,978 INFO L226 Difference]: Without dead ends: 153962 [2021-11-22 14:57:07,022 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 [2021-11-22 14:57:07,023 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 795 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:07,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1138 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-22 14:57:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153962 states. [2021-11-22 14:57:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153962 to 150001. [2021-11-22 14:57:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150001 states, 150000 states have (on average 1.0774533333333334) internal successors, (161618), 150000 states have internal predecessors, (161618), 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) [2021-11-22 14:57:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150001 states to 150001 states and 161618 transitions. [2021-11-22 14:57:09,619 INFO L78 Accepts]: Start accepts. Automaton has 150001 states and 161618 transitions. Word has length 437 [2021-11-22 14:57:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:09,620 INFO L470 AbstractCegarLoop]: Abstraction has 150001 states and 161618 transitions. [2021-11-22 14:57:09,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2021-11-22 14:57:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 150001 states and 161618 transitions. [2021-11-22 14:57:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2021-11-22 14:57:09,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:09,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:09,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:57:09,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1901999821, now seen corresponding path program 1 times [2021-11-22 14:57:09,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:09,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698732485] [2021-11-22 14:57:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:09,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 405 proven. 113 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-22 14:57:10,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:10,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698732485] [2021-11-22 14:57:10,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698732485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:57:10,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357507934] [2021-11-22 14:57:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:10,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:10,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:57:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:57:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-22 14:57:10,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:57:10,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357507934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:10,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:57:10,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-22 14:57:10,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075805535] [2021-11-22 14:57:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:10,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:57:10,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:57:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:10,824 INFO L87 Difference]: Start difference. First operand 150001 states and 161618 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-11-22 14:57:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:16,391 INFO L93 Difference]: Finished difference Result 331486 states and 359581 transitions. [2021-11-22 14:57:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:57:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 447 [2021-11-22 14:57:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:16,636 INFO L225 Difference]: With dead ends: 331486 [2021-11-22 14:57:16,636 INFO L226 Difference]: Without dead ends: 182274 [2021-11-22 14:57:16,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:16,706 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 930 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:16,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 889 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-22 14:57:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182274 states. [2021-11-22 14:57:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182274 to 180680. [2021-11-22 14:57:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180680 states, 180679 states have (on average 1.0821124757166023) internal successors, (195515), 180679 states have internal predecessors, (195515), 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) [2021-11-22 14:57:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180680 states to 180680 states and 195515 transitions. [2021-11-22 14:57:19,370 INFO L78 Accepts]: Start accepts. Automaton has 180680 states and 195515 transitions. Word has length 447 [2021-11-22 14:57:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:19,371 INFO L470 AbstractCegarLoop]: Abstraction has 180680 states and 195515 transitions. [2021-11-22 14:57:19,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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) [2021-11-22 14:57:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 180680 states and 195515 transitions. [2021-11-22 14:57:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-11-22 14:57:19,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:19,393 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-22 14:57:19,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 14:57:19,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:19,596 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1149099589, now seen corresponding path program 1 times [2021-11-22 14:57:19,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601338891] [2021-11-22 14:57:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:19,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-22 14:57:20,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:20,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601338891] [2021-11-22 14:57:20,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601338891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:20,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:57:20,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:57:20,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777221732] [2021-11-22 14:57:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:20,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:57:20,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:57:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:57:20,414 INFO L87 Difference]: Start difference. First operand 180680 states and 195515 transitions. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2021-11-22 14:57:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:25,638 INFO L93 Difference]: Finished difference Result 362149 states and 391828 transitions. [2021-11-22 14:57:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:57:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 516 [2021-11-22 14:57:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:25,843 INFO L225 Difference]: With dead ends: 362149 [2021-11-22 14:57:25,843 INFO L226 Difference]: Without dead ends: 182258 [2021-11-22 14:57:25,897 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 [2021-11-22 14:57:25,898 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 835 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:25,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1469 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-22 14:57:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182258 states. [2021-11-22 14:57:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182258 to 180669. [2021-11-22 14:57:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180669 states, 180668 states have (on average 1.0637190869440079) internal successors, (192180), 180668 states have internal predecessors, (192180), 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) [2021-11-22 14:57:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180669 states to 180669 states and 192180 transitions. [2021-11-22 14:57:28,660 INFO L78 Accepts]: Start accepts. Automaton has 180669 states and 192180 transitions. Word has length 516 [2021-11-22 14:57:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:28,660 INFO L470 AbstractCegarLoop]: Abstraction has 180669 states and 192180 transitions. [2021-11-22 14:57:28,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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) [2021-11-22 14:57:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 180669 states and 192180 transitions. [2021-11-22 14:57:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2021-11-22 14:57:28,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:28,684 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:28,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:57:28,685 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 582012110, now seen corresponding path program 1 times [2021-11-22 14:57:28,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806148910] [2021-11-22 14:57:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:28,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 345 proven. 113 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-22 14:57:29,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806148910] [2021-11-22 14:57:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806148910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:57:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799409661] [2021-11-22 14:57:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:29,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:29,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:29,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:29,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:57:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:57:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:57:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-22 14:57:30,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:57:30,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799409661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:57:30,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:57:30,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-22 14:57:30,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790892632] [2021-11-22 14:57:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:57:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:57:30,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:57:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:57:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:30,912 INFO L87 Difference]: Start difference. First operand 180669 states and 192180 transitions. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-11-22 14:57:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:57:35,788 INFO L93 Difference]: Finished difference Result 355016 states and 378663 transitions. [2021-11-22 14:57:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:57:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 528 [2021-11-22 14:57:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:57:36,004 INFO L225 Difference]: With dead ends: 355016 [2021-11-22 14:57:36,004 INFO L226 Difference]: Without dead ends: 191669 [2021-11-22 14:57:36,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:57:36,054 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 1092 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 3067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-22 14:57:36,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 389 Invalid, 3067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-22 14:57:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191669 states. [2021-11-22 14:57:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191669 to 191669. [2021-11-22 14:57:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191669 states, 191668 states have (on average 1.0599891479015797) internal successors, (203166), 191668 states have internal predecessors, (203166), 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) [2021-11-22 14:57:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191669 states to 191669 states and 203166 transitions. [2021-11-22 14:57:39,089 INFO L78 Accepts]: Start accepts. Automaton has 191669 states and 203166 transitions. Word has length 528 [2021-11-22 14:57:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:57:39,090 INFO L470 AbstractCegarLoop]: Abstraction has 191669 states and 203166 transitions. [2021-11-22 14:57:39,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2021-11-22 14:57:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 191669 states and 203166 transitions. [2021-11-22 14:57:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-11-22 14:57:39,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:57:39,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:57:39,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:57:39,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:57:39,317 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:57:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:57:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1539402955, now seen corresponding path program 1 times [2021-11-22 14:57:39,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:57:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355024710] [2021-11-22 14:57:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:39,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:57:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 514 proven. 113 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-22 14:57:39,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:57:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355024710] [2021-11-22 14:57:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355024710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:57:39,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109316109] [2021-11-22 14:57:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:57:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:57:39,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:57:39,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:57:39,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9bdc297-b620-4bee-8af5-17400f4ae9c9/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:57:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:57:39,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:57:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates...