./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label34.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label34.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a7333ef933779062b72e4ec060ffb43da7d841912b7d7ec92a1b0251fa27640 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:38:58,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:38:58,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:38:58,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:38:58,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:38:58,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:38:58,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:38:58,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:38:58,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:38:58,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:38:58,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:38:58,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:38:58,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:38:58,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:38:58,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:38:58,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:38:58,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:38:58,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:38:58,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:38:58,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:38:58,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:38:58,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:38:58,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:38:58,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:38:58,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:38:58,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:38:58,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:38:58,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:38:58,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:38:58,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:38:58,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:38:58,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:38:58,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:38:58,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:38:58,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:38:58,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:38:58,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:38:58,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:38:58,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:38:58,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:38:58,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:38:58,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:38:58,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:38:58,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:38:58,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:38:58,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:38:58,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:38:58,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:38:58,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:38:58,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:38:58,397 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:38:58,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:38:58,397 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:38:58,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:38:58,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:38:58,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:38:58,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:38:58,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:38:58,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:38:58,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:38:58,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:38:58,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:38:58,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:38:58,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:38:58,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:38:58,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:38:58,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:38:58,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:38:58,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:38:58,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:38:58,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:38:58,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:38:58,406 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:38:58,406 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:38:58,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:38:58,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:38:58,407 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_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a7333ef933779062b72e4ec060ffb43da7d841912b7d7ec92a1b0251fa27640 [2021-11-13 17:38:58,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:38:58,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:38:58,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:38:58,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:38:58,753 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:38:58,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem19_label34.c [2021-11-13 17:38:58,849 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/data/e0b276686/a34470d8452d43b9b03b3bc7f37a7ff7/FLAG09dee56db [2021-11-13 17:39:00,126 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:39:00,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/sv-benchmarks/c/eca-rers2012/Problem19_label34.c [2021-11-13 17:39:00,192 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/data/e0b276686/a34470d8452d43b9b03b3bc7f37a7ff7/FLAG09dee56db [2021-11-13 17:39:00,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/data/e0b276686/a34470d8452d43b9b03b3bc7f37a7ff7 [2021-11-13 17:39:00,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:39:00,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:39:00,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:39:00,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:39:00,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:39:00,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:39:00" (1/1) ... [2021-11-13 17:39:00,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50818808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:00, skipping insertion in model container [2021-11-13 17:39:00,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:39:00" (1/1) ... [2021-11-13 17:39:00,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:39:00,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:39:01,079 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/sv-benchmarks/c/eca-rers2012/Problem19_label34.c[6640,6653] [2021-11-13 17:39:03,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:39:03,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:39:03,434 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/sv-benchmarks/c/eca-rers2012/Problem19_label34.c[6640,6653] [2021-11-13 17:39:04,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:39:04,944 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:39:04,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04 WrapperNode [2021-11-13 17:39:04,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:39:04,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:39:04,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:39:04,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:39:04,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:05,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:06,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:39:06,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:39:06,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:39:06,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:39:06,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:06,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:06,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:06,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:07,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:07,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:07,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:08,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:39:08,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:39:08,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:39:08,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:39:08,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (1/1) ... [2021-11-13 17:39:08,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:39:08,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:39:08,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:39:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:39:08,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:39:08,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:39:08,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:39:08,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:39:19,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:39:19,977 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:39:19,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:39:19 BoogieIcfgContainer [2021-11-13 17:39:19,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:39:19,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:39:19,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:39:19,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:39:19,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:39:00" (1/3) ... [2021-11-13 17:39:19,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb3868b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:39:19, skipping insertion in model container [2021-11-13 17:39:19,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:39:04" (2/3) ... [2021-11-13 17:39:19,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb3868b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:39:19, skipping insertion in model container [2021-11-13 17:39:19,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:39:19" (3/3) ... [2021-11-13 17:39:20,001 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label34.c [2021-11-13 17:39:20,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:39:20,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:39:20,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:39:20,137 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:39:20,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:39:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 17:39:20,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:39:20,241 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] [2021-11-13 17:39:20,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:39:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:39:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-11-13 17:39:20,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:39:20,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114131595] [2021-11-13 17:39:20,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:39:20,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:39:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:39:20,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:39:20,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114131595] [2021-11-13 17:39:20,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114131595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:39:20,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:39:20,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:39:20,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994434622] [2021-11-13 17:39:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:39:20,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:39:20,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:39:20,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:39:20,827 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:39:39,472 INFO L93 Difference]: Finished difference Result 6288 states and 12045 transitions. [2021-11-13 17:39:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:39:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2021-11-13 17:39:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:39:39,552 INFO L225 Difference]: With dead ends: 6288 [2021-11-13 17:39:39,553 INFO L226 Difference]: Without dead ends: 4471 [2021-11-13 17:39:39,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:39:39,582 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 4582 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 7124 mSolverCounterSat, 3651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15125.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4582 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 10775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 111.88ms SdHoareTripleChecker+Time, 3651 IncrementalHoareTripleChecker+Valid, 7124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17936.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:39:39,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4582 Valid, 1011 Invalid, 10775 Unknown, 0 Unchecked, 111.88ms Time], IncrementalHoareTripleChecker [3651 Valid, 7124 Invalid, 0 Unknown, 0 Unchecked, 17936.73ms Time] [2021-11-13 17:39:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2021-11-13 17:39:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 4467. [2021-11-13 17:39:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4466 states have (on average 1.5665024630541873) internal successors, (6996), 4466 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6996 transitions. [2021-11-13 17:39:39,912 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6996 transitions. Word has length 50 [2021-11-13 17:39:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:39:39,914 INFO L470 AbstractCegarLoop]: Abstraction has 4467 states and 6996 transitions. [2021-11-13 17:39:39,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6996 transitions. [2021-11-13 17:39:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-13 17:39:39,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:39:39,944 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:39:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:39:39,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:39:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:39:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -60815551, now seen corresponding path program 1 times [2021-11-13 17:39:39,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:39:39,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142958235] [2021-11-13 17:39:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:39:39,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:39:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 17:39:40,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:39:40,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142958235] [2021-11-13 17:39:40,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142958235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:39:40,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:39:40,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:39:40,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002359811] [2021-11-13 17:39:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:39:40,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:39:40,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:39:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:39:40,569 INFO L87 Difference]: Start difference. First operand 4467 states and 6996 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:39:56,090 INFO L93 Difference]: Finished difference Result 11710 states and 20221 transitions. [2021-11-13 17:39:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:39:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-13 17:39:56,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:39:56,159 INFO L225 Difference]: With dead ends: 11710 [2021-11-13 17:39:56,159 INFO L226 Difference]: Without dead ends: 8610 [2021-11-13 17:39:56,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:39:56,169 INFO L933 BasicCegarLoop]: 1801 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9445 mSolverCounterSat, 1332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12586.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 10777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 60.46ms SdHoareTripleChecker+Time, 1332 IncrementalHoareTripleChecker+Valid, 9445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15071.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:39:56,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2155 Invalid, 10777 Unknown, 0 Unchecked, 60.46ms Time], IncrementalHoareTripleChecker [1332 Valid, 9445 Invalid, 0 Unknown, 0 Unchecked, 15071.92ms Time] [2021-11-13 17:39:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-11-13 17:39:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 8596. [2021-11-13 17:39:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 1.348458406050029) internal successors, (11590), 8595 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 11590 transitions. [2021-11-13 17:39:56,463 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 11590 transitions. Word has length 324 [2021-11-13 17:39:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:39:56,466 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 11590 transitions. [2021-11-13 17:39:56,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:39:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 11590 transitions. [2021-11-13 17:39:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-13 17:39:56,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:39:56,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:39:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:39:56,480 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:39:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:39:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1954138457, now seen corresponding path program 1 times [2021-11-13 17:39:56,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:39:56,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220292195] [2021-11-13 17:39:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:39:56,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:39:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:39:56,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:39:56,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220292195] [2021-11-13 17:39:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220292195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:39:56,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:39:56,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:39:56,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082943786] [2021-11-13 17:39:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:39:56,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:39:56,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:39:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:39:56,963 INFO L87 Difference]: Start difference. First operand 8596 states and 11590 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:06,934 INFO L93 Difference]: Finished difference Result 14491 states and 20461 transitions. [2021-11-13 17:40:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:40:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 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 352 [2021-11-13 17:40:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:06,993 INFO L225 Difference]: With dead ends: 14491 [2021-11-13 17:40:06,993 INFO L226 Difference]: Without dead ends: 8596 [2021-11-13 17:40:07,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:40:07,005 INFO L933 BasicCegarLoop]: 1773 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8282.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 7329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.38ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9721.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:07,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2115 Invalid, 7329 Unknown, 0 Unchecked, 28.38ms Time], IncrementalHoareTripleChecker [8 Valid, 7321 Invalid, 0 Unknown, 0 Unchecked, 9721.48ms Time] [2021-11-13 17:40:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2021-11-13 17:40:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 8596. [2021-11-13 17:40:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8595 states have (on average 1.3469458987783596) internal successors, (11577), 8595 states have internal predecessors, (11577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 11577 transitions. [2021-11-13 17:40:07,280 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 11577 transitions. Word has length 352 [2021-11-13 17:40:07,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:07,281 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 11577 transitions. [2021-11-13 17:40:07,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 11577 transitions. [2021-11-13 17:40:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2021-11-13 17:40:07,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:07,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:07,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:40:07,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:40:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash -21632050, now seen corresponding path program 1 times [2021-11-13 17:40:07,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:07,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861096032] [2021-11-13 17:40:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:07,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 117 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:40:07,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:07,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861096032] [2021-11-13 17:40:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861096032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:40:07,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447775461] [2021-11-13 17:40:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:07,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:40:07,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:40:07,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:40:07,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:40:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:40:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:40:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:40:09,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:40:09,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447775461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:40:09,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:40:09,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 17:40:09,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48859789] [2021-11-13 17:40:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:40:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:40:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:40:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:40:09,847 INFO L87 Difference]: Start difference. First operand 8596 states and 11577 transitions. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:17,975 INFO L93 Difference]: Finished difference Result 19935 states and 28708 transitions. [2021-11-13 17:40:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:40:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 604 [2021-11-13 17:40:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:18,055 INFO L225 Difference]: With dead ends: 19935 [2021-11-13 17:40:18,056 INFO L226 Difference]: Without dead ends: 14071 [2021-11-13 17:40:18,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:40:18,069 INFO L933 BasicCegarLoop]: 1371 mSDtfsCounter, 1730 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 1728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6579.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.92ms SdHoareTripleChecker+Time, 1728 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7878.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:18,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 1508 Invalid, 5592 Unknown, 0 Unchecked, 27.92ms Time], IncrementalHoareTripleChecker [1728 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 7878.08ms Time] [2021-11-13 17:40:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2021-11-13 17:40:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 14071. [2021-11-13 17:40:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14071 states, 14070 states have (on average 1.2694385216773276) internal successors, (17861), 14070 states have internal predecessors, (17861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14071 states to 14071 states and 17861 transitions. [2021-11-13 17:40:18,593 INFO L78 Accepts]: Start accepts. Automaton has 14071 states and 17861 transitions. Word has length 604 [2021-11-13 17:40:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:18,595 INFO L470 AbstractCegarLoop]: Abstraction has 14071 states and 17861 transitions. [2021-11-13 17:40:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14071 states and 17861 transitions. [2021-11-13 17:40:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2021-11-13 17:40:18,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:18,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:18,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:40:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:40:18,832 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:40:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 82559656, now seen corresponding path program 1 times [2021-11-13 17:40:18,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:18,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732217969] [2021-11-13 17:40:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:18,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 17:40:19,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732217969] [2021-11-13 17:40:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732217969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:40:19,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:40:19,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:40:19,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131320753] [2021-11-13 17:40:19,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:40:19,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:40:19,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:40:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:40:19,275 INFO L87 Difference]: Start difference. First operand 14071 states and 17861 transitions. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:29,747 INFO L93 Difference]: Finished difference Result 36504 states and 47794 transitions. [2021-11-13 17:40:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:40:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 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 605 [2021-11-13 17:40:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:29,816 INFO L225 Difference]: With dead ends: 36504 [2021-11-13 17:40:29,817 INFO L226 Difference]: Without dead ends: 25165 [2021-11-13 17:40:29,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:40:29,834 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 2110 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5095 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8681.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.73ms SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10154.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:29,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2110 Valid, 964 Invalid, 5529 Unknown, 0 Unchecked, 27.73ms Time], IncrementalHoareTripleChecker [434 Valid, 5095 Invalid, 0 Unknown, 0 Unchecked, 10154.97ms Time] [2021-11-13 17:40:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25165 states. [2021-11-13 17:40:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25165 to 23797. [2021-11-13 17:40:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23797 states, 23796 states have (on average 1.2674399058665322) internal successors, (30160), 23796 states have internal predecessors, (30160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23797 states to 23797 states and 30160 transitions. [2021-11-13 17:40:30,422 INFO L78 Accepts]: Start accepts. Automaton has 23797 states and 30160 transitions. Word has length 605 [2021-11-13 17:40:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:30,424 INFO L470 AbstractCegarLoop]: Abstraction has 23797 states and 30160 transitions. [2021-11-13 17:40:30,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23797 states and 30160 transitions. [2021-11-13 17:40:30,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2021-11-13 17:40:30,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:30,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:30,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:40:30,455 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:40:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1289471842, now seen corresponding path program 1 times [2021-11-13 17:40:30,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:30,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584685508] [2021-11-13 17:40:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:30,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:40:30,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:30,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584685508] [2021-11-13 17:40:30,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584685508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:40:30,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:40:30,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:40:30,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648258049] [2021-11-13 17:40:30,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:40:30,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:40:30,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:40:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:40:30,940 INFO L87 Difference]: Start difference. First operand 23797 states and 30160 transitions. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:39,315 INFO L93 Difference]: Finished difference Result 50347 states and 65462 transitions. [2021-11-13 17:40:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:40:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 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 622 [2021-11-13 17:40:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:39,389 INFO L225 Difference]: With dead ends: 50347 [2021-11-13 17:40:39,389 INFO L226 Difference]: Without dead ends: 29282 [2021-11-13 17:40:39,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:40:39,419 INFO L933 BasicCegarLoop]: 676 mSDtfsCounter, 1377 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 2125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6724.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 6046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.75ms SdHoareTripleChecker+Time, 2125 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8037.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:39,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 723 Invalid, 6046 Unknown, 0 Unchecked, 28.75ms Time], IncrementalHoareTripleChecker [2125 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 8037.57ms Time] [2021-11-13 17:40:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29282 states. [2021-11-13 17:40:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29282 to 29267. [2021-11-13 17:40:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29267 states, 29266 states have (on average 1.2553133328777422) internal successors, (36738), 29266 states have internal predecessors, (36738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29267 states to 29267 states and 36738 transitions. [2021-11-13 17:40:39,929 INFO L78 Accepts]: Start accepts. Automaton has 29267 states and 36738 transitions. Word has length 622 [2021-11-13 17:40:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:39,931 INFO L470 AbstractCegarLoop]: Abstraction has 29267 states and 36738 transitions. [2021-11-13 17:40:39,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 2 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29267 states and 36738 transitions. [2021-11-13 17:40:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2021-11-13 17:40:39,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:39,944 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:39,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:40:39,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:40:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:39,947 INFO L85 PathProgramCache]: Analyzing trace with hash 279482666, now seen corresponding path program 1 times [2021-11-13 17:40:39,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:39,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307235622] [2021-11-13 17:40:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:39,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:40:40,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:40,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307235622] [2021-11-13 17:40:40,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307235622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:40:40,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:40:40,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:40:40,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650048914] [2021-11-13 17:40:40,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:40:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:40:40,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:40:40,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:40:40,561 INFO L87 Difference]: Start difference. First operand 29267 states and 36738 transitions. Second operand has 4 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:55,992 INFO L93 Difference]: Finished difference Result 98282 states and 126943 transitions. [2021-11-13 17:40:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:40:56,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 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 834 [2021-11-13 17:40:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:56,122 INFO L225 Difference]: With dead ends: 98282 [2021-11-13 17:40:56,122 INFO L226 Difference]: Without dead ends: 71747 [2021-11-13 17:40:56,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:40:56,151 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 3380 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 8462 mSolverCounterSat, 3305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12386.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3380 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 11767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.13ms SdHoareTripleChecker+Time, 3305 IncrementalHoareTripleChecker+Valid, 8462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14806.18ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:56,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3380 Valid, 1082 Invalid, 11767 Unknown, 0 Unchecked, 50.13ms Time], IncrementalHoareTripleChecker [3305 Valid, 8462 Invalid, 0 Unknown, 0 Unchecked, 14806.18ms Time] [2021-11-13 17:40:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71747 states. [2021-11-13 17:40:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71747 to 68933. [2021-11-13 17:40:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68933 states, 68932 states have (on average 1.223118435559682) internal successors, (84312), 68932 states have internal predecessors, (84312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68933 states to 68933 states and 84312 transitions. [2021-11-13 17:40:57,558 INFO L78 Accepts]: Start accepts. Automaton has 68933 states and 84312 transitions. Word has length 834 [2021-11-13 17:40:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:57,559 INFO L470 AbstractCegarLoop]: Abstraction has 68933 states and 84312 transitions. [2021-11-13 17:40:57,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:40:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 68933 states and 84312 transitions. [2021-11-13 17:40:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2021-11-13 17:40:57,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:57,587 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:57,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:40:57,588 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:40:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:57,589 INFO L85 PathProgramCache]: Analyzing trace with hash 390301225, now seen corresponding path program 1 times [2021-11-13 17:40:57,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:57,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922113431] [2021-11-13 17:40:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:57,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-13 17:40:58,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:58,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922113431] [2021-11-13 17:40:58,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922113431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:40:58,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:40:58,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:40:58,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544913222] [2021-11-13 17:40:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:40:58,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:40:58,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:40:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:40:58,905 INFO L87 Difference]: Start difference. First operand 68933 states and 84312 transitions. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:41:08,521 INFO L93 Difference]: Finished difference Result 176184 states and 219727 transitions. [2021-11-13 17:41:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:41:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 910 [2021-11-13 17:41:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:41:08,712 INFO L225 Difference]: With dead ends: 176184 [2021-11-13 17:41:08,712 INFO L226 Difference]: Without dead ends: 109983 [2021-11-13 17:41:08,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:41:08,761 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 1577 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 4974 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7322.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 6056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.16ms SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 4974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8726.94ms IncrementalHoareTripleChecker+Time [2021-11-13 17:41:08,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1577 Valid, 953 Invalid, 6056 Unknown, 0 Unchecked, 30.16ms Time], IncrementalHoareTripleChecker [1082 Valid, 4974 Invalid, 0 Unknown, 0 Unchecked, 8726.94ms Time] [2021-11-13 17:41:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109983 states. [2021-11-13 17:41:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109983 to 107160. [2021-11-13 17:41:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107160 states, 107159 states have (on average 1.252027361210911) internal successors, (134166), 107159 states have internal predecessors, (134166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107160 states to 107160 states and 134166 transitions. [2021-11-13 17:41:11,179 INFO L78 Accepts]: Start accepts. Automaton has 107160 states and 134166 transitions. Word has length 910 [2021-11-13 17:41:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:41:11,180 INFO L470 AbstractCegarLoop]: Abstraction has 107160 states and 134166 transitions. [2021-11-13 17:41:11,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 107160 states and 134166 transitions. [2021-11-13 17:41:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2021-11-13 17:41:11,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:41:11,225 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:41:11,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:41:11,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:41:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:41:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1812576373, now seen corresponding path program 1 times [2021-11-13 17:41:11,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:41:11,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105741110] [2021-11-13 17:41:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:41:11,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:41:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:41:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 747 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 17:41:12,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:41:12,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105741110] [2021-11-13 17:41:12,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105741110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:41:12,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:41:12,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:41:12,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172336187] [2021-11-13 17:41:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:41:12,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:41:12,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:41:12,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:41:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:41:12,286 INFO L87 Difference]: Start difference. First operand 107160 states and 134166 transitions. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:41:23,524 INFO L93 Difference]: Finished difference Result 219881 states and 274099 transitions. [2021-11-13 17:41:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:41:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 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 1087 [2021-11-13 17:41:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:41:23,688 INFO L225 Difference]: With dead ends: 219881 [2021-11-13 17:41:23,688 INFO L226 Difference]: Without dead ends: 107261 [2021-11-13 17:41:23,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:41:23,746 INFO L933 BasicCegarLoop]: 2885 mSDtfsCounter, 4263 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 6895 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8632.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4263 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 8331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.58ms SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 6895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10274.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:41:23,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4263 Valid, 3237 Invalid, 8331 Unknown, 0 Unchecked, 57.58ms Time], IncrementalHoareTripleChecker [1436 Valid, 6895 Invalid, 0 Unknown, 0 Unchecked, 10274.26ms Time] [2021-11-13 17:41:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107261 states. [2021-11-13 17:41:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107261 to 105776. [2021-11-13 17:41:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105776 states, 105775 states have (on average 1.1805719688017018) internal successors, (124875), 105775 states have internal predecessors, (124875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105776 states to 105776 states and 124875 transitions. [2021-11-13 17:41:25,753 INFO L78 Accepts]: Start accepts. Automaton has 105776 states and 124875 transitions. Word has length 1087 [2021-11-13 17:41:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:41:25,755 INFO L470 AbstractCegarLoop]: Abstraction has 105776 states and 124875 transitions. [2021-11-13 17:41:25,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 105776 states and 124875 transitions. [2021-11-13 17:41:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1088 [2021-11-13 17:41:25,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:41:25,817 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:41:25,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:41:25,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:41:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:41:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 858171085, now seen corresponding path program 1 times [2021-11-13 17:41:25,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:41:25,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867522776] [2021-11-13 17:41:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:41:25,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:41:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:41:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 893 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-13 17:41:26,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:41:26,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867522776] [2021-11-13 17:41:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867522776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:41:26,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:41:26,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:41:26,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854222194] [2021-11-13 17:41:26,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:41:26,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:41:26,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:41:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:41:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:41:26,917 INFO L87 Difference]: Start difference. First operand 105776 states and 124875 transitions. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:41:37,167 INFO L93 Difference]: Finished difference Result 271706 states and 319914 transitions. [2021-11-13 17:41:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:41:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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 1087 [2021-11-13 17:41:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:41:37,716 INFO L225 Difference]: With dead ends: 271706 [2021-11-13 17:41:37,717 INFO L226 Difference]: Without dead ends: 168662 [2021-11-13 17:41:37,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:41:37,759 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 1689 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 2224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7333.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 6410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.46ms SdHoareTripleChecker+Time, 2224 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8994.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:41:37,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 530 Invalid, 6410 Unknown, 0 Unchecked, 32.46ms Time], IncrementalHoareTripleChecker [2224 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 8994.60ms Time] [2021-11-13 17:41:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168662 states. [2021-11-13 17:41:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168662 to 142630. [2021-11-13 17:41:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142630 states, 142629 states have (on average 1.1863926690925408) internal successors, (169214), 142629 states have internal predecessors, (169214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142630 states to 142630 states and 169214 transitions. [2021-11-13 17:41:40,129 INFO L78 Accepts]: Start accepts. Automaton has 142630 states and 169214 transitions. Word has length 1087 [2021-11-13 17:41:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:41:40,130 INFO L470 AbstractCegarLoop]: Abstraction has 142630 states and 169214 transitions. [2021-11-13 17:41:40,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 142630 states and 169214 transitions. [2021-11-13 17:41:40,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1121 [2021-11-13 17:41:40,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:41:40,153 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:41:40,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:41:40,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:41:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:41:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1544097456, now seen corresponding path program 1 times [2021-11-13 17:41:40,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:41:40,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783141577] [2021-11-13 17:41:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:41:40,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:41:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:41:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 789 proven. 0 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-11-13 17:41:41,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:41:41,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783141577] [2021-11-13 17:41:41,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783141577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:41:41,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:41:41,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:41:41,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210509133] [2021-11-13 17:41:41,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:41:41,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:41:41,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:41:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:41:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:41:41,270 INFO L87 Difference]: Start difference. First operand 142630 states and 169214 transitions. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:41:50,903 INFO L93 Difference]: Finished difference Result 282536 states and 335705 transitions. [2021-11-13 17:41:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:41:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1120 [2021-11-13 17:41:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:41:51,178 INFO L225 Difference]: With dead ends: 282536 [2021-11-13 17:41:51,179 INFO L226 Difference]: Without dead ends: 142638 [2021-11-13 17:41:51,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:41:51,269 INFO L933 BasicCegarLoop]: 2821 mSDtfsCounter, 1345 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4380 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6574.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 5247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.23ms SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 4380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7873.31ms IncrementalHoareTripleChecker+Time [2021-11-13 17:41:51,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 3005 Invalid, 5247 Unknown, 0 Unchecked, 32.23ms Time], IncrementalHoareTripleChecker [867 Valid, 4380 Invalid, 0 Unknown, 0 Unchecked, 7873.31ms Time] [2021-11-13 17:41:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142638 states. [2021-11-13 17:41:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142638 to 142628. [2021-11-13 17:41:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142628 states, 142627 states have (on average 1.123321671212323) internal successors, (160216), 142627 states have internal predecessors, (160216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142628 states to 142628 states and 160216 transitions. [2021-11-13 17:41:53,686 INFO L78 Accepts]: Start accepts. Automaton has 142628 states and 160216 transitions. Word has length 1120 [2021-11-13 17:41:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:41:53,687 INFO L470 AbstractCegarLoop]: Abstraction has 142628 states and 160216 transitions. [2021-11-13 17:41:53,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:41:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 142628 states and 160216 transitions. [2021-11-13 17:41:53,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2021-11-13 17:41:53,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:41:53,712 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:41:53,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:41:53,713 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:41:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:41:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1660307865, now seen corresponding path program 1 times [2021-11-13 17:41:53,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:41:53,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455986366] [2021-11-13 17:41:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:41:53,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:41:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:41:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 966 proven. 313 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-13 17:41:54,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:41:54,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455986366] [2021-11-13 17:41:54,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455986366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:41:54,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934406050] [2021-11-13 17:41:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:41:54,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:41:54,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:41:54,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:41:54,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:41:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:41:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:41:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:41:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 977 proven. 0 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-13 17:41:58,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:41:58,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934406050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:41:58,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:41:58,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 17:41:58,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754657574] [2021-11-13 17:41:58,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:41:58,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:41:58,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:41:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:41:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:41:58,172 INFO L87 Difference]: Start difference. First operand 142628 states and 160216 transitions. Second operand has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:42:08,231 INFO L93 Difference]: Finished difference Result 285348 states and 320672 transitions. [2021-11-13 17:42:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:42:08,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 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 1139 [2021-11-13 17:42:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:42:08,452 INFO L225 Difference]: With dead ends: 285348 [2021-11-13 17:42:08,452 INFO L226 Difference]: Without dead ends: 145452 [2021-11-13 17:42:08,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:42:08,521 INFO L933 BasicCegarLoop]: 2976 mSDtfsCounter, 1353 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 1484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7253.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 3141 SdHoareTripleChecker+Invalid, 5566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.16ms SdHoareTripleChecker+Time, 1484 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8662.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:42:08,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 3141 Invalid, 5566 Unknown, 0 Unchecked, 37.16ms Time], IncrementalHoareTripleChecker [1484 Valid, 4082 Invalid, 0 Unknown, 0 Unchecked, 8662.55ms Time] [2021-11-13 17:42:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145452 states. [2021-11-13 17:42:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145452 to 145379. [2021-11-13 17:42:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145379 states, 145378 states have (on average 1.1006066942728612) internal successors, (160004), 145378 states have internal predecessors, (160004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145379 states to 145379 states and 160004 transitions. [2021-11-13 17:42:11,173 INFO L78 Accepts]: Start accepts. Automaton has 145379 states and 160004 transitions. Word has length 1139 [2021-11-13 17:42:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:42:11,175 INFO L470 AbstractCegarLoop]: Abstraction has 145379 states and 160004 transitions. [2021-11-13 17:42:11,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 145379 states and 160004 transitions. [2021-11-13 17:42:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1198 [2021-11-13 17:42:11,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:42:11,209 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:42:11,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:42:11,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 17:42:11,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:42:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:42:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1033298886, now seen corresponding path program 1 times [2021-11-13 17:42:11,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:42:11,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16126275] [2021-11-13 17:42:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:42:11,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:42:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:42:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 1235 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2021-11-13 17:42:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:42:12,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16126275] [2021-11-13 17:42:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16126275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:42:12,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:42:12,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:42:12,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108520773] [2021-11-13 17:42:12,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:42:12,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:42:12,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:42:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:42:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:42:12,167 INFO L87 Difference]: Start difference. First operand 145379 states and 160004 transitions. Second operand has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:42:28,243 INFO L93 Difference]: Finished difference Result 428649 states and 480728 transitions. [2021-11-13 17:42:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:42:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 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 1197 [2021-11-13 17:42:28,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:42:28,624 INFO L225 Difference]: With dead ends: 428649 [2021-11-13 17:42:28,625 INFO L226 Difference]: Without dead ends: 286002 [2021-11-13 17:42:28,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:42:28,696 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 5078 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 4186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11253.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5078 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 10073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.45ms SdHoareTripleChecker+Time, 4186 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13771.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:42:28,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5078 Valid, 901 Invalid, 10073 Unknown, 0 Unchecked, 50.45ms Time], IncrementalHoareTripleChecker [4186 Valid, 5887 Invalid, 0 Unknown, 0 Unchecked, 13771.35ms Time] [2021-11-13 17:42:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286002 states. [2021-11-13 17:42:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286002 to 276429. [2021-11-13 17:42:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276429 states, 276428 states have (on average 1.099194003501816) internal successors, (303848), 276428 states have internal predecessors, (303848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276429 states to 276429 states and 303848 transitions. [2021-11-13 17:42:33,377 INFO L78 Accepts]: Start accepts. Automaton has 276429 states and 303848 transitions. Word has length 1197 [2021-11-13 17:42:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:42:33,379 INFO L470 AbstractCegarLoop]: Abstraction has 276429 states and 303848 transitions. [2021-11-13 17:42:33,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:42:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 276429 states and 303848 transitions. [2021-11-13 17:42:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1457 [2021-11-13 17:42:34,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:42:34,187 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:42:34,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:42:34,188 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:42:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:42:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -497957841, now seen corresponding path program 1 times [2021-11-13 17:42:34,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:42:34,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630322720] [2021-11-13 17:42:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:42:34,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:42:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:42:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 700 proven. 485 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-13 17:42:35,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:42:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630322720] [2021-11-13 17:42:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630322720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:42:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172588644] [2021-11-13 17:42:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:42:35,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:42:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:42:35,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:42:35,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373b49a-f20a-4a46-a4b4-098639a81f7d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:42:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:42:36,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:42:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:42:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2021-11-13 17:42:39,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:42:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172588644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:42:39,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:42:39,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-13 17:42:39,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887946320] [2021-11-13 17:42:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:42:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:42:39,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:42:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:42:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:42:39,306 INFO L87 Difference]: Start difference. First operand 276429 states and 303848 transitions. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 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)