./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label14.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_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/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_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/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_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/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 885db8f329f3cb77dfd41c47160cbfbb1b6e2c58b023e8af0fae7aece51927da --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:30:32,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:30:32,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:30:32,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:30:32,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:30:32,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:30:32,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:30:32,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:30:32,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:30:32,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:30:32,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:30:32,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:30:32,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:30:32,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:30:32,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:30:32,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:30:32,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:30:32,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:30:32,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:30:32,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:30:32,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:30:32,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:30:32,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:30:32,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:30:32,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:30:32,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:30:32,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:30:32,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:30:32,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:30:32,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:30:32,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:30:32,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:30:32,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:30:32,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:30:32,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:30:32,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:30:32,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:30:32,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:30:32,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:30:32,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:30:32,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:30:32,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:30:32,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:30:32,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:30:32,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:30:32,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:30:32,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:30:32,431 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:30:32,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:30:32,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:30:32,433 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:30:32,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:30:32,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:30:32,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:30:32,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:30:32,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:30:32,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:30:32,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:30:32,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:30:32,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:30:32,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:30:32,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:30:32,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:30:32,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:30:32,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:30:32,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:30:32,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:32,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:30:32,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:30:32,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:30:32,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:30:32,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:30:32,440 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:30:32,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:30:32,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:30:32,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:30:32,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 885db8f329f3cb77dfd41c47160cbfbb1b6e2c58b023e8af0fae7aece51927da [2021-11-13 18:30:32,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:30:32,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:30:32,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:30:32,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:30:32,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:30:32,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2021-11-13 18:30:32,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/data/c4a5ceb78/6c9f0a52fd74454cbe63dd89db093a21/FLAG9bb7039cc [2021-11-13 18:30:33,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:30:33,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/sv-benchmarks/c/eca-rers2012/Problem19_label14.c [2021-11-13 18:30:34,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/data/c4a5ceb78/6c9f0a52fd74454cbe63dd89db093a21/FLAG9bb7039cc [2021-11-13 18:30:34,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/data/c4a5ceb78/6c9f0a52fd74454cbe63dd89db093a21 [2021-11-13 18:30:34,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:30:34,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:30:34,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:34,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:30:34,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:30:34,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:34" (1/1) ... [2021-11-13 18:30:34,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e1fbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:34, skipping insertion in model container [2021-11-13 18:30:34,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:34" (1/1) ... [2021-11-13 18:30:34,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:30:34,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:30:34,915 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_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/sv-benchmarks/c/eca-rers2012/Problem19_label14.c[2035,2048] [2021-11-13 18:30:36,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:36,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:30:36,780 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_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/sv-benchmarks/c/eca-rers2012/Problem19_label14.c[2035,2048] [2021-11-13 18:30:37,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:37,980 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:30:37,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37 WrapperNode [2021-11-13 18:30:37,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:37,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:37,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:30:37,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:30:37,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:38,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:39,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:39,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:30:39,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:30:39,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:30:39,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:39,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:39,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:39,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:40,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:40,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:40,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:40,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:30:40,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:30:40,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:30:40,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:30:40,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (1/1) ... [2021-11-13 18:30:40,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:40,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:30:40,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:30:40,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:30:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:30:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:30:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:30:49,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:30:49,986 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:30:49,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:49 BoogieIcfgContainer [2021-11-13 18:30:49,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:30:49,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:30:49,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:30:49,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:30:49,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:30:34" (1/3) ... [2021-11-13 18:30:49,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d0b7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:49, skipping insertion in model container [2021-11-13 18:30:49,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:37" (2/3) ... [2021-11-13 18:30:49,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d0b7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:49, skipping insertion in model container [2021-11-13 18:30:49,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:49" (3/3) ... [2021-11-13 18:30:49,999 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label14.c [2021-11-13 18:30:50,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:30:50,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:30:50,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:30:50,069 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 18:30:50,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:30:50,257 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 18:30:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:30:50,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:50,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:50,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2021-11-13 18:30:50,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:50,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277291918] [2021-11-13 18:30:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:50,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:50,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:50,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277291918] [2021-11-13 18:30:50,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277291918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:50,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:50,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:30:50,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499880985] [2021-11-13 18:30:50,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:50,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:30:50,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:30:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:30:50,508 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 18:30:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:59,085 INFO L93 Difference]: Finished difference Result 4967 states and 9412 transitions. [2021-11-13 18:30:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:30:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-13 18:30:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:59,141 INFO L225 Difference]: With dead ends: 4967 [2021-11-13 18:30:59,141 INFO L226 Difference]: Without dead ends: 3155 [2021-11-13 18:30:59,152 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 18:30:59,158 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 1759 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4878 mSolverCounterSat, 1336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6928.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 6214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.19ms SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 4878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8265.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:59,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 629 Invalid, 6214 Unknown, 0 Unchecked, 50.19ms Time], IncrementalHoareTripleChecker [1336 Valid, 4878 Invalid, 0 Unknown, 0 Unchecked, 8265.19ms Time] [2021-11-13 18:30:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2021-11-13 18:30:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 3104. [2021-11-13 18:30:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 1.8572349339349017) internal successors, (5763), 3103 states have internal predecessors, (5763), 0 states have call successors, (0), 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 18:30:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5763 transitions. [2021-11-13 18:30:59,336 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5763 transitions. Word has length 12 [2021-11-13 18:30:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:59,337 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5763 transitions. [2021-11-13 18:30:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 18:30:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5763 transitions. [2021-11-13 18:30:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:30:59,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:59,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:59,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:30:59,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1716783738, now seen corresponding path program 1 times [2021-11-13 18:30:59,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:59,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434052952] [2021-11-13 18:30:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:59,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:59,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:59,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434052952] [2021-11-13 18:30:59,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434052952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:59,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:30:59,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917488399] [2021-11-13 18:30:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:59,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:59,603 INFO L87 Difference]: Start difference. First operand 3104 states and 5763 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 18:31:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:14,074 INFO L93 Difference]: Finished difference Result 10338 states and 19368 transitions. [2021-11-13 18:31:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:31:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-13 18:31:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:14,119 INFO L225 Difference]: With dead ends: 10338 [2021-11-13 18:31:14,120 INFO L226 Difference]: Without dead ends: 7236 [2021-11-13 18:31:14,124 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 18:31:14,125 INFO L933 BasicCegarLoop]: 1750 mSDtfsCounter, 4192 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 10666 mSolverCounterSat, 2147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11901.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4192 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 12813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.95ms SdHoareTripleChecker+Time, 2147 IncrementalHoareTripleChecker+Valid, 10666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14056.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:14,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4192 Valid, 2019 Invalid, 12813 Unknown, 0 Unchecked, 57.95ms Time], IncrementalHoareTripleChecker [2147 Valid, 10666 Invalid, 0 Unknown, 0 Unchecked, 14056.00ms Time] [2021-11-13 18:31:14,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-11-13 18:31:14,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7234. [2021-11-13 18:31:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7234 states, 7233 states have (on average 1.6527028895340798) internal successors, (11954), 7233 states have internal predecessors, (11954), 0 states have call successors, (0), 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 18:31:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7234 states to 7234 states and 11954 transitions. [2021-11-13 18:31:14,309 INFO L78 Accepts]: Start accepts. Automaton has 7234 states and 11954 transitions. Word has length 79 [2021-11-13 18:31:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:14,310 INFO L470 AbstractCegarLoop]: Abstraction has 7234 states and 11954 transitions. [2021-11-13 18:31:14,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 18:31:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7234 states and 11954 transitions. [2021-11-13 18:31:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:31:14,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:14,318 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:31:14,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:31:14,319 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -5755295, now seen corresponding path program 1 times [2021-11-13 18:31:14,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:14,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484524241] [2021-11-13 18:31:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:14,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:31:14,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:14,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484524241] [2021-11-13 18:31:14,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484524241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:14,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:14,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:31:14,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930486293] [2021-11-13 18:31:14,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:14,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:31:14,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:31:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:31:14,656 INFO L87 Difference]: Start difference. First operand 7234 states and 11954 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 18:31:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:25,831 INFO L93 Difference]: Finished difference Result 17240 states and 29899 transitions. [2021-11-13 18:31:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:31:25,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-11-13 18:31:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:25,884 INFO L225 Difference]: With dead ends: 17240 [2021-11-13 18:31:25,884 INFO L226 Difference]: Without dead ends: 11373 [2021-11-13 18:31:25,892 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 18:31:25,894 INFO L933 BasicCegarLoop]: 1802 mSDtfsCounter, 3755 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9453 mSolverCounterSat, 1246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9203.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3755 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 10699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.83ms SdHoareTripleChecker+Time, 1246 IncrementalHoareTripleChecker+Valid, 9453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10877.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:25,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3755 Valid, 2156 Invalid, 10699 Unknown, 0 Unchecked, 30.83ms Time], IncrementalHoareTripleChecker [1246 Valid, 9453 Invalid, 0 Unknown, 0 Unchecked, 10877.17ms Time] [2021-11-13 18:31:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-11-13 18:31:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11358. [2021-11-13 18:31:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11358 states, 11357 states have (on average 1.4571629831821784) internal successors, (16549), 11357 states have internal predecessors, (16549), 0 states have call successors, (0), 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 18:31:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11358 states to 11358 states and 16549 transitions. [2021-11-13 18:31:26,159 INFO L78 Accepts]: Start accepts. Automaton has 11358 states and 16549 transitions. Word has length 219 [2021-11-13 18:31:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 11358 states and 16549 transitions. [2021-11-13 18:31:26,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 18:31:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 11358 states and 16549 transitions. [2021-11-13 18:31:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-13 18:31:26,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:26,171 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:31:26,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:31:26,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 965934139, now seen corresponding path program 1 times [2021-11-13 18:31:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:26,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060405000] [2021-11-13 18:31:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:26,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:31:26,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:26,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060405000] [2021-11-13 18:31:26,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060405000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:26,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:26,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:31:26,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334558811] [2021-11-13 18:31:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:26,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:31:26,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:31:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:31:26,387 INFO L87 Difference]: Start difference. First operand 11358 states and 16549 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:33,182 INFO L93 Difference]: Finished difference Result 25514 states and 40480 transitions. [2021-11-13 18:31:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:31:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-13 18:31:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:33,231 INFO L225 Difference]: With dead ends: 25514 [2021-11-13 18:31:33,231 INFO L226 Difference]: Without dead ends: 16888 [2021-11-13 18:31:33,242 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 18:31:33,243 INFO L933 BasicCegarLoop]: 1321 mSDtfsCounter, 1368 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 4264 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5528.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 5737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.08ms SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 4264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6593.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:33,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 1539 Invalid, 5737 Unknown, 0 Unchecked, 16.08ms Time], IncrementalHoareTripleChecker [1473 Valid, 4264 Invalid, 0 Unknown, 0 Unchecked, 6593.70ms Time] [2021-11-13 18:31:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16888 states. [2021-11-13 18:31:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16888 to 16861. [2021-11-13 18:31:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 16860 states have (on average 1.3918742586002373) internal successors, (23467), 16860 states have internal predecessors, (23467), 0 states have call successors, (0), 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 18:31:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 23467 transitions. [2021-11-13 18:31:33,570 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 23467 transitions. Word has length 247 [2021-11-13 18:31:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:33,572 INFO L470 AbstractCegarLoop]: Abstraction has 16861 states and 23467 transitions. [2021-11-13 18:31:33,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 23467 transitions. [2021-11-13 18:31:33,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-13 18:31:33,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:33,583 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:31:33,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:31:33,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -539551963, now seen corresponding path program 1 times [2021-11-13 18:31:33,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:33,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715174057] [2021-11-13 18:31:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:33,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 18:31:33,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:33,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715174057] [2021-11-13 18:31:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715174057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:33,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:33,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:31:33,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452613226] [2021-11-13 18:31:33,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:33,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:31:33,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:33,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:31:33,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:31:33,897 INFO L87 Difference]: Start difference. First operand 16861 states and 23467 transitions. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 18:31:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:40,509 INFO L93 Difference]: Finished difference Result 31021 states and 44215 transitions. [2021-11-13 18:31:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:31:40,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 383 [2021-11-13 18:31:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:40,549 INFO L225 Difference]: With dead ends: 31021 [2021-11-13 18:31:40,549 INFO L226 Difference]: Without dead ends: 16861 [2021-11-13 18:31:40,561 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 18:31:40,562 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5714 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5486.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 5722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.57ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6417.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:40,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1953 Invalid, 5722 Unknown, 0 Unchecked, 13.57ms Time], IncrementalHoareTripleChecker [8 Valid, 5714 Invalid, 0 Unknown, 0 Unchecked, 6417.72ms Time] [2021-11-13 18:31:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2021-11-13 18:31:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 16861. [2021-11-13 18:31:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 16860 states have (on average 1.3911032028469752) internal successors, (23454), 16860 states have internal predecessors, (23454), 0 states have call successors, (0), 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 18:31:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 23454 transitions. [2021-11-13 18:31:40,841 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 23454 transitions. Word has length 383 [2021-11-13 18:31:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:40,842 INFO L470 AbstractCegarLoop]: Abstraction has 16861 states and 23454 transitions. [2021-11-13 18:31:40,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 18:31:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 23454 transitions. [2021-11-13 18:31:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-13 18:31:40,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:40,859 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:40,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:31:40,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash -962442688, now seen corresponding path program 1 times [2021-11-13 18:31:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:40,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791827423] [2021-11-13 18:31:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:40,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:31:41,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:41,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791827423] [2021-11-13 18:31:41,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791827423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:41,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:41,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:31:41,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841610503] [2021-11-13 18:31:41,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:41,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:31:41,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:31:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:31:41,241 INFO L87 Difference]: Start difference. First operand 16861 states and 23454 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 18:31:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:47,833 INFO L93 Difference]: Finished difference Result 43503 states and 62836 transitions. [2021-11-13 18:31:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:31:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 568 [2021-11-13 18:31:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:47,891 INFO L225 Difference]: With dead ends: 43503 [2021-11-13 18:31:47,891 INFO L226 Difference]: Without dead ends: 29374 [2021-11-13 18:31:47,910 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 18:31:47,911 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 1355 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5337.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.40ms SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6342.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:47,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1608 Invalid, 5626 Unknown, 0 Unchecked, 16.40ms Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 6342.99ms Time] [2021-11-13 18:31:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29374 states. [2021-11-13 18:31:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29374 to 29356. [2021-11-13 18:31:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29356 states, 29355 states have (on average 1.2879577584738546) internal successors, (37808), 29355 states have internal predecessors, (37808), 0 states have call successors, (0), 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 18:31:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29356 states to 29356 states and 37808 transitions. [2021-11-13 18:31:48,373 INFO L78 Accepts]: Start accepts. Automaton has 29356 states and 37808 transitions. Word has length 568 [2021-11-13 18:31:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:48,375 INFO L470 AbstractCegarLoop]: Abstraction has 29356 states and 37808 transitions. [2021-11-13 18:31:48,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 18:31:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29356 states and 37808 transitions. [2021-11-13 18:31:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-11-13 18:31:48,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:48,381 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:48,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:31:48,382 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:48,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2104126081, now seen corresponding path program 1 times [2021-11-13 18:31:48,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:48,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592593650] [2021-11-13 18:31:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:48,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-13 18:31:48,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:48,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592593650] [2021-11-13 18:31:48,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592593650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:48,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:31:48,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037013949] [2021-11-13 18:31:48,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:31:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:31:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:31:48,824 INFO L87 Difference]: Start difference. First operand 29356 states and 37808 transitions. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 18:31:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:55,253 INFO L93 Difference]: Finished difference Result 65554 states and 85847 transitions. [2021-11-13 18:31:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:31:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 573 [2021-11-13 18:31:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:55,306 INFO L225 Difference]: With dead ends: 65554 [2021-11-13 18:31:55,307 INFO L226 Difference]: Without dead ends: 38930 [2021-11-13 18:31:55,333 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 18:31:55,334 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 1387 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5103.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 6049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.51ms SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6115.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:55,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 756 Invalid, 6049 Unknown, 0 Unchecked, 16.51ms Time], IncrementalHoareTripleChecker [2122 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 6115.30ms Time] [2021-11-13 18:31:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38930 states. [2021-11-13 18:31:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38930 to 38914. [2021-11-13 18:31:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38914 states, 38913 states have (on average 1.2647444298820445) internal successors, (49215), 38913 states have internal predecessors, (49215), 0 states have call successors, (0), 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 18:31:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38914 states to 38914 states and 49215 transitions. [2021-11-13 18:31:56,113 INFO L78 Accepts]: Start accepts. Automaton has 38914 states and 49215 transitions. Word has length 573 [2021-11-13 18:31:56,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:56,115 INFO L470 AbstractCegarLoop]: Abstraction has 38914 states and 49215 transitions. [2021-11-13 18:31:56,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 2 states have internal predecessors, (501), 0 states have call successors, (0), 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 18:31:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 38914 states and 49215 transitions. [2021-11-13 18:31:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-11-13 18:31:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:56,123 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:31:56,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:31:56,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash -401924212, now seen corresponding path program 1 times [2021-11-13 18:31:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:31:56,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531779744] [2021-11-13 18:31:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:56,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:31:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 176 proven. 44 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:31:56,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:31:56,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531779744] [2021-11-13 18:31:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531779744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:31:56,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163452652] [2021-11-13 18:31:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:56,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:31:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:31:56,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:31:56,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:31:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:31:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:31:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:31:58,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:31:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163452652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:58,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:31:58,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 18:31:58,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846202427] [2021-11-13 18:31:58,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:31:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:31:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:31:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:31:58,090 INFO L87 Difference]: Start difference. First operand 38914 states and 49215 transitions. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 18:32:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:05,331 INFO L93 Difference]: Finished difference Result 106482 states and 136633 transitions. [2021-11-13 18:32:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:32:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 637 [2021-11-13 18:32:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:05,407 INFO L225 Difference]: With dead ends: 106482 [2021-11-13 18:32:05,407 INFO L226 Difference]: Without dead ends: 70300 [2021-11-13 18:32:05,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 636 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 18:32:05,432 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 2532 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5733.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.55ms SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6798.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:05,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2532 Valid, 809 Invalid, 5519 Unknown, 0 Unchecked, 15.55ms Time], IncrementalHoareTripleChecker [1472 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 6798.30ms Time] [2021-11-13 18:32:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70300 states. [2021-11-13 18:32:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70300 to 66200. [2021-11-13 18:32:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66200 states, 66199 states have (on average 1.249550597441049) internal successors, (82719), 66199 states have internal predecessors, (82719), 0 states have call successors, (0), 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 18:32:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66200 states to 66200 states and 82719 transitions. [2021-11-13 18:32:06,872 INFO L78 Accepts]: Start accepts. Automaton has 66200 states and 82719 transitions. Word has length 637 [2021-11-13 18:32:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:06,873 INFO L470 AbstractCegarLoop]: Abstraction has 66200 states and 82719 transitions. [2021-11-13 18:32:06,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 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 18:32:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 66200 states and 82719 transitions. [2021-11-13 18:32:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2021-11-13 18:32:06,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:06,881 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:06,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:32:07,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:32:07,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1090727023, now seen corresponding path program 1 times [2021-11-13 18:32:07,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:32:07,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776333569] [2021-11-13 18:32:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:07,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:32:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:32:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 19 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:32:08,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:32:08,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776333569] [2021-11-13 18:32:08,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776333569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:32:08,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833356128] [2021-11-13 18:32:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:08,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:32:08,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:32:08,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:32:08,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:32:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:32:08,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:32:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:32:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:32:10,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:32:10,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833356128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:32:10,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:32:10,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-13 18:32:10,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593220981] [2021-11-13 18:32:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:32:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:32:10,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:32:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:32:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:32:10,601 INFO L87 Difference]: Start difference. First operand 66200 states and 82719 transitions. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 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 18:32:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:21,790 INFO L93 Difference]: Finished difference Result 131108 states and 164220 transitions. [2021-11-13 18:32:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:32:21,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 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 706 [2021-11-13 18:32:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:21,880 INFO L225 Difference]: With dead ends: 131108 [2021-11-13 18:32:21,881 INFO L226 Difference]: Without dead ends: 67640 [2021-11-13 18:32:21,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:32:21,910 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 2704 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 7415 mSolverCounterSat, 4062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8719.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 11477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.63ms SdHoareTripleChecker+Time, 4062 IncrementalHoareTripleChecker+Valid, 7415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10617.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:21,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 942 Invalid, 11477 Unknown, 0 Unchecked, 34.63ms Time], IncrementalHoareTripleChecker [4062 Valid, 7415 Invalid, 0 Unknown, 0 Unchecked, 10617.42ms Time] [2021-11-13 18:32:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67640 states. [2021-11-13 18:32:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67640 to 67576. [2021-11-13 18:32:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67576 states, 67575 states have (on average 1.2028264890862006) internal successors, (81281), 67575 states have internal predecessors, (81281), 0 states have call successors, (0), 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 18:32:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67576 states to 67576 states and 81281 transitions. [2021-11-13 18:32:23,011 INFO L78 Accepts]: Start accepts. Automaton has 67576 states and 81281 transitions. Word has length 706 [2021-11-13 18:32:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:23,012 INFO L470 AbstractCegarLoop]: Abstraction has 67576 states and 81281 transitions. [2021-11-13 18:32:23,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 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 18:32:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 67576 states and 81281 transitions. [2021-11-13 18:32:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2021-11-13 18:32:23,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:23,021 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:32:23,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:32:23,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:32:23,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1663760921, now seen corresponding path program 1 times [2021-11-13 18:32:23,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:32:23,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735278508] [2021-11-13 18:32:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:23,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:32:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:32:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-11-13 18:32:23,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:32:23,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735278508] [2021-11-13 18:32:23,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735278508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:32:23,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:32:23,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:32:23,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938282654] [2021-11-13 18:32:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:32:23,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:32:23,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:32:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:32:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:32:23,859 INFO L87 Difference]: Start difference. First operand 67576 states and 81281 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 18:32:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:31,718 INFO L93 Difference]: Finished difference Result 158389 states and 194711 transitions. [2021-11-13 18:32:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:32:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 785 [2021-11-13 18:32:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:31,811 INFO L225 Difference]: With dead ends: 158389 [2021-11-13 18:32:31,811 INFO L226 Difference]: Without dead ends: 93545 [2021-11-13 18:32:31,839 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 18:32:31,840 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1532 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 1673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6012.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 5703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.48ms SdHoareTripleChecker+Time, 1673 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7243.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:31,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 1723 Invalid, 5703 Unknown, 0 Unchecked, 20.48ms Time], IncrementalHoareTripleChecker [1673 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 7243.95ms Time] [2021-11-13 18:32:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93545 states. [2021-11-13 18:32:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93545 to 68885. [2021-11-13 18:32:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68885 states, 68884 states have (on average 1.200830381510946) internal successors, (82718), 68884 states have internal predecessors, (82718), 0 states have call successors, (0), 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 18:32:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68885 states to 68885 states and 82718 transitions. [2021-11-13 18:32:32,827 INFO L78 Accepts]: Start accepts. Automaton has 68885 states and 82718 transitions. Word has length 785 [2021-11-13 18:32:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:32,828 INFO L470 AbstractCegarLoop]: Abstraction has 68885 states and 82718 transitions. [2021-11-13 18:32:32,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 18:32:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 68885 states and 82718 transitions. [2021-11-13 18:32:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2021-11-13 18:32:32,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:32,839 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:32,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:32:32,839 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1742135891, now seen corresponding path program 1 times [2021-11-13 18:32:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:32:32,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020342069] [2021-11-13 18:32:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:32,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:32:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:32:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 530 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-13 18:32:33,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:32:33,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020342069] [2021-11-13 18:32:33,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020342069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:32:33,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:32:33,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:32:33,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971761108] [2021-11-13 18:32:33,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:32:33,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:32:33,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:32:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:32:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:32:33,574 INFO L87 Difference]: Start difference. First operand 68885 states and 82718 transitions. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 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 18:32:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:47,004 INFO L93 Difference]: Finished difference Result 217104 states and 263151 transitions. [2021-11-13 18:32:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:32:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 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 920 [2021-11-13 18:32:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:47,164 INFO L225 Difference]: With dead ends: 217104 [2021-11-13 18:32:47,164 INFO L226 Difference]: Without dead ends: 150951 [2021-11-13 18:32:47,194 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 18:32:47,195 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 3444 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 8316 mSolverCounterSat, 3155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10573.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 11471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.24ms SdHoareTripleChecker+Time, 3155 IncrementalHoareTripleChecker+Valid, 8316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12547.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:47,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3444 Valid, 1106 Invalid, 11471 Unknown, 0 Unchecked, 31.24ms Time], IncrementalHoareTripleChecker [3155 Valid, 8316 Invalid, 0 Unknown, 0 Unchecked, 12547.31ms Time] [2021-11-13 18:32:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150951 states. [2021-11-13 18:32:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150951 to 135838. [2021-11-13 18:32:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135838 states, 135837 states have (on average 1.1887482791875557) internal successors, (161476), 135837 states have internal predecessors, (161476), 0 states have call successors, (0), 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 18:32:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135838 states to 135838 states and 161476 transitions. [2021-11-13 18:32:49,354 INFO L78 Accepts]: Start accepts. Automaton has 135838 states and 161476 transitions. Word has length 920 [2021-11-13 18:32:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:49,355 INFO L470 AbstractCegarLoop]: Abstraction has 135838 states and 161476 transitions. [2021-11-13 18:32:49,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 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 18:32:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 135838 states and 161476 transitions. [2021-11-13 18:32:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2021-11-13 18:32:49,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:49,393 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:32:49,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:32:49,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1483650083, now seen corresponding path program 1 times [2021-11-13 18:32:49,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:32:49,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752088635] [2021-11-13 18:32:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:49,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:32:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:32:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:32:49,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:32:49,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752088635] [2021-11-13 18:32:49,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752088635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:32:49,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:32:49,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:32:49,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194368933] [2021-11-13 18:32:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:32:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:32:49,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:32:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:32:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:32:49,820 INFO L87 Difference]: Start difference. First operand 135838 states and 161476 transitions. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 18:32:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:58,823 INFO L93 Difference]: Finished difference Result 327713 states and 391665 transitions. [2021-11-13 18:32:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:32:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 941 [2021-11-13 18:32:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:59,281 INFO L225 Difference]: With dead ends: 327713 [2021-11-13 18:32:59,282 INFO L226 Difference]: Without dead ends: 194607 [2021-11-13 18:32:59,370 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 18:32:59,371 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 1671 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 4236 mSolverCounterSat, 2261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6339.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 6497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.48ms SdHoareTripleChecker+Time, 2261 IncrementalHoareTripleChecker+Valid, 4236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7843.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:59,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1671 Valid, 596 Invalid, 6497 Unknown, 0 Unchecked, 22.48ms Time], IncrementalHoareTripleChecker [2261 Valid, 4236 Invalid, 0 Unknown, 0 Unchecked, 7843.94ms Time] [2021-11-13 18:32:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194607 states. [2021-11-13 18:33:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194607 to 183595. [2021-11-13 18:33:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183595 states, 183594 states have (on average 1.2012647472139613) internal successors, (220545), 183594 states have internal predecessors, (220545), 0 states have call successors, (0), 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 18:33:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183595 states to 183595 states and 220545 transitions. [2021-11-13 18:33:02,072 INFO L78 Accepts]: Start accepts. Automaton has 183595 states and 220545 transitions. Word has length 941 [2021-11-13 18:33:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:33:02,073 INFO L470 AbstractCegarLoop]: Abstraction has 183595 states and 220545 transitions. [2021-11-13 18:33:02,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 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 18:33:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 183595 states and 220545 transitions. [2021-11-13 18:33:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2021-11-13 18:33:02,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:33:02,087 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:33:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:33:02,087 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:33:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:33:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -405792792, now seen corresponding path program 1 times [2021-11-13 18:33:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:33:02,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629306582] [2021-11-13 18:33:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:33:02,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:33:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:33:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 294 proven. 455 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-11-13 18:33:03,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:33:03,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629306582] [2021-11-13 18:33:03,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629306582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:33:03,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133185274] [2021-11-13 18:33:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:33:03,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:33:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:33:03,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:33:03,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:33:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:33:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:33:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:33:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:33:05,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:33:05,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133185274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:33:05,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:33:05,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-13 18:33:05,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208877953] [2021-11-13 18:33:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:33:05,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:33:05,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:33:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:33:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:33:05,026 INFO L87 Difference]: Start difference. First operand 183595 states and 220545 transitions. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 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 18:33:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:33:12,485 INFO L93 Difference]: Finished difference Result 423157 states and 506328 transitions. [2021-11-13 18:33:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:33:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 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 962 [2021-11-13 18:33:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:33:12,770 INFO L225 Difference]: With dead ends: 423157 [2021-11-13 18:33:12,770 INFO L226 Difference]: Without dead ends: 240929 [2021-11-13 18:33:12,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:33:12,832 INFO L933 BasicCegarLoop]: 2649 mSDtfsCounter, 1596 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 1584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4780.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 5294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.05ms SdHoareTripleChecker+Time, 1584 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5878.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:33:12,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 2783 Invalid, 5294 Unknown, 0 Unchecked, 19.05ms Time], IncrementalHoareTripleChecker [1584 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 5878.05ms Time] [2021-11-13 18:33:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240929 states. [2021-11-13 18:33:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240929 to 213615. [2021-11-13 18:33:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213615 states, 213614 states have (on average 1.1467647251584634) internal successors, (244965), 213614 states have internal predecessors, (244965), 0 states have call successors, (0), 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 18:33:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213615 states to 213615 states and 244965 transitions. [2021-11-13 18:33:16,031 INFO L78 Accepts]: Start accepts. Automaton has 213615 states and 244965 transitions. Word has length 962 [2021-11-13 18:33:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:33:16,032 INFO L470 AbstractCegarLoop]: Abstraction has 213615 states and 244965 transitions. [2021-11-13 18:33:16,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 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 18:33:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 213615 states and 244965 transitions. [2021-11-13 18:33:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 997 [2021-11-13 18:33:16,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:33:16,050 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:33:16,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:33:16,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9d50cd-0101-4e93-8d8b-98f5784e04aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:33:16,254 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:33:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:33:16,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1004481292, now seen corresponding path program 1 times [2021-11-13 18:33:16,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:33:16,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326310212] [2021-11-13 18:33:16,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:33:16,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:33:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:33:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 455 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-13 18:33:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:33:16,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326310212] [2021-11-13 18:33:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326310212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:33:16,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:33:16,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:33:16,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516783751] [2021-11-13 18:33:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:33:16,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:33:16,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:33:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:33:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:33:16,778 INFO L87 Difference]: Start difference. First operand 213615 states and 244965 transitions. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 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 18:33:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:33:29,349 INFO L93 Difference]: Finished difference Result 565101 states and 656999 transitions. [2021-11-13 18:33:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:33:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 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 996 [2021-11-13 18:33:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:33:29,855 INFO L225 Difference]: With dead ends: 565101 [2021-11-13 18:33:29,855 INFO L226 Difference]: Without dead ends: 354218 [2021-11-13 18:33:29,935 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 18:33:29,936 INFO L933 BasicCegarLoop]: 1032 mSDtfsCounter, 4909 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 5947 mSolverCounterSat, 3611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8773.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4909 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 9558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.14ms SdHoareTripleChecker+Time, 3611 IncrementalHoareTripleChecker+Valid, 5947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10520.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:33:29,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4909 Valid, 1168 Invalid, 9558 Unknown, 0 Unchecked, 27.14ms Time], IncrementalHoareTripleChecker [3611 Valid, 5947 Invalid, 0 Unknown, 0 Unchecked, 10520.64ms Time] [2021-11-13 18:33:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354218 states. [2021-11-13 18:33:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354218 to 337826. [2021-11-13 18:33:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337826 states, 337825 states have (on average 1.1225486568489602) internal successors, (379225), 337825 states have internal predecessors, (379225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)