./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY --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 484926faa58a404dd95f955e93679d6ad13b338cc4627616c79e80f48803476c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:45:49,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:45:49,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:45:50,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:45:50,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:45:50,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:45:50,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:45:50,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:45:50,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:45:50,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:45:50,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:45:50,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:45:50,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:45:50,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:45:50,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:45:50,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:45:50,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:45:50,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:45:50,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:45:50,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:45:50,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:45:50,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:45:50,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:45:50,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:45:50,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:45:50,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:45:50,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:45:50,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:45:50,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:45:50,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:45:50,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:45:50,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:45:50,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:45:50,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:45:50,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:45:50,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:45:50,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:45:50,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:45:50,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:45:50,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:45:50,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:45:50,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:45:50,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:45:50,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:45:50,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:45:50,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:45:50,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:45:50,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:45:50,172 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:45:50,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:45:50,172 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:45:50,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:45:50,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:45:50,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:45:50,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:45:50,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:45:50,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:45:50,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:45:50,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:45:50,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:45:50,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:45:50,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:45:50,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:45:50,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:45:50,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:45:50,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:45:50,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:45:50,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:45:50,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:45:50,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:45:50,177 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:45:50,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:45:50,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:45:50,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:45:50,180 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_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484926faa58a404dd95f955e93679d6ad13b338cc4627616c79e80f48803476c [2021-11-07 07:45:50,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:45:50,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:45:50,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:45:50,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:45:50,438 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:45:50,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2021-11-07 07:45:50,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/data/c5908eb43/5e05f407373c4b818f3d816ca536d86a/FLAGb170dc761 [2021-11-07 07:45:51,308 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:45:51,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2021-11-07 07:45:51,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/data/c5908eb43/5e05f407373c4b818f3d816ca536d86a/FLAGb170dc761 [2021-11-07 07:45:51,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/data/c5908eb43/5e05f407373c4b818f3d816ca536d86a [2021-11-07 07:45:51,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:45:51,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:45:51,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:45:51,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:45:51,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:45:51,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:45:51" (1/1) ... [2021-11-07 07:45:51,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ceef4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:51, skipping insertion in model container [2021-11-07 07:45:51,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:45:51" (1/1) ... [2021-11-07 07:45:51,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:45:52,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:45:52,399 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_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/sv-benchmarks/c/eca-rers2012/Problem13_label28.c[2473,2486] [2021-11-07 07:45:53,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:45:53,715 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:45:53,741 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_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/sv-benchmarks/c/eca-rers2012/Problem13_label28.c[2473,2486] [2021-11-07 07:45:54,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:45:54,497 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:45:54,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54 WrapperNode [2021-11-07 07:45:54,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:45:54,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:45:54,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:45:54,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:45:54,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:54,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:45:55,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:45:55,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:45:55,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:45:55,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:55,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:56,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:56,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:45:56,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:45:56,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:45:56,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:45:56,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (1/1) ... [2021-11-07 07:45:56,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:45:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:56,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:45:56,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:45:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:45:56,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:45:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:45:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:46:01,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:46:01,915 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 07:46:01,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:46:01 BoogieIcfgContainer [2021-11-07 07:46:01,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:46:01,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:46:01,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:46:01,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:46:01,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:45:51" (1/3) ... [2021-11-07 07:46:01,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502f3da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:46:01, skipping insertion in model container [2021-11-07 07:46:01,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:45:54" (2/3) ... [2021-11-07 07:46:01,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@502f3da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:46:01, skipping insertion in model container [2021-11-07 07:46:01,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:46:01" (3/3) ... [2021-11-07 07:46:01,928 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label28.c [2021-11-07 07:46:01,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:46:01,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:46:01,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:46:01,994 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 [2021-11-07 07:46:01,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:46:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:46:02,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:02,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:02,041 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-11-07 07:46:02,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:02,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72968836] [2021-11-07 07:46:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:02,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:02,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:02,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72968836] [2021-11-07 07:46:02,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72968836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:02,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:02,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:46:02,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12820925] [2021-11-07 07:46:02,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:02,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:02,258 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:07,218 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-11-07 07:46:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-07 07:46:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:07,247 INFO L225 Difference]: With dead ends: 3082 [2021-11-07 07:46:07,247 INFO L226 Difference]: Without dead ends: 1899 [2021-11-07 07:46:07,257 INFO L786 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 [2021-11-07 07:46:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-07 07:46:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-11-07 07:46:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-11-07 07:46:07,404 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 15 [2021-11-07 07:46:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:07,405 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-11-07 07:46:07,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-11-07 07:46:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:46:07,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:07,409 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:46:07,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:46:07,410 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 719746634, now seen corresponding path program 1 times [2021-11-07 07:46:07,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:07,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456771127] [2021-11-07 07:46:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:07,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:07,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:07,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456771127] [2021-11-07 07:46:07,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456771127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:07,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:07,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:46:07,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065731694] [2021-11-07 07:46:07,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:07,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:07,654 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:12,087 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2021-11-07 07:46:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:12,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-07 07:46:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:12,110 INFO L225 Difference]: With dead ends: 5384 [2021-11-07 07:46:12,111 INFO L226 Difference]: Without dead ends: 3492 [2021-11-07 07:46:12,114 INFO L786 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 [2021-11-07 07:46:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-11-07 07:46:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2021-11-07 07:46:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2021-11-07 07:46:12,210 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 80 [2021-11-07 07:46:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:12,211 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2021-11-07 07:46:12,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2021-11-07 07:46:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:46:12,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:12,217 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:46:12,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:46:12,218 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1405100497, now seen corresponding path program 1 times [2021-11-07 07:46:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:12,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951284547] [2021-11-07 07:46:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:12,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:12,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:12,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951284547] [2021-11-07 07:46:12,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951284547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:12,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:12,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:46:12,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257546707] [2021-11-07 07:46:12,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:12,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:12,374 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:16,022 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2021-11-07 07:46:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:16,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-07 07:46:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:16,060 INFO L225 Difference]: With dead ends: 10169 [2021-11-07 07:46:16,061 INFO L226 Difference]: Without dead ends: 6680 [2021-11-07 07:46:16,066 INFO L786 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 [2021-11-07 07:46:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2021-11-07 07:46:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2021-11-07 07:46:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2021-11-07 07:46:16,225 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 82 [2021-11-07 07:46:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:16,228 INFO L470 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2021-11-07 07:46:16,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2021-11-07 07:46:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:46:16,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:16,237 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:46:16,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:46:16,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash -770747971, now seen corresponding path program 1 times [2021-11-07 07:46:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:16,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244484552] [2021-11-07 07:46:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:16,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:16,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:16,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244484552] [2021-11-07 07:46:16,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244484552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:16,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:16,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219870140] [2021-11-07 07:46:16,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:16,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:16,400 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:20,348 INFO L93 Difference]: Finished difference Result 19656 states and 27046 transitions. [2021-11-07 07:46:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-07 07:46:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:20,421 INFO L225 Difference]: With dead ends: 19656 [2021-11-07 07:46:20,421 INFO L226 Difference]: Without dead ends: 12989 [2021-11-07 07:46:20,432 INFO L786 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 [2021-11-07 07:46:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12989 states. [2021-11-07 07:46:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12989 to 12972. [2021-11-07 07:46:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2366818286947807) internal successors, (16041), 12971 states have internal predecessors, (16041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16041 transitions. [2021-11-07 07:46:20,741 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16041 transitions. Word has length 126 [2021-11-07 07:46:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:20,743 INFO L470 AbstractCegarLoop]: Abstraction has 12972 states and 16041 transitions. [2021-11-07 07:46:20,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16041 transitions. [2021-11-07 07:46:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 07:46:20,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:20,751 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:46:20,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:46:20,752 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -741796308, now seen corresponding path program 1 times [2021-11-07 07:46:20,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:20,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515005173] [2021-11-07 07:46:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:20,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:20,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515005173] [2021-11-07 07:46:20,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515005173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:20,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:46:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242587503] [2021-11-07 07:46:20,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:20,872 INFO L87 Difference]: Start difference. First operand 12972 states and 16041 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:24,258 INFO L93 Difference]: Finished difference Result 22792 states and 28661 transitions. [2021-11-07 07:46:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:24,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-07 07:46:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:24,300 INFO L225 Difference]: With dead ends: 22792 [2021-11-07 07:46:24,300 INFO L226 Difference]: Without dead ends: 12980 [2021-11-07 07:46:24,310 INFO L786 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 [2021-11-07 07:46:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12980 states. [2021-11-07 07:46:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12980 to 12972. [2021-11-07 07:46:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2351399275306454) internal successors, (16021), 12971 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16021 transitions. [2021-11-07 07:46:24,522 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16021 transitions. Word has length 131 [2021-11-07 07:46:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:24,522 INFO L470 AbstractCegarLoop]: Abstraction has 12972 states and 16021 transitions. [2021-11-07 07:46:24,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16021 transitions. [2021-11-07 07:46:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-07 07:46:24,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:24,527 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:24,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:46:24,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1937391824, now seen corresponding path program 1 times [2021-11-07 07:46:24,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:24,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699241590] [2021-11-07 07:46:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:24,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:46:24,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:24,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699241590] [2021-11-07 07:46:24,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699241590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:24,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:24,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:24,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412292910] [2021-11-07 07:46:24,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:24,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:24,716 INFO L87 Difference]: Start difference. First operand 12972 states and 16021 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:28,463 INFO L93 Difference]: Finished difference Result 36166 states and 45139 transitions. [2021-11-07 07:46:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:28,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-07 07:46:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:28,605 INFO L225 Difference]: With dead ends: 36166 [2021-11-07 07:46:28,606 INFO L226 Difference]: Without dead ends: 23196 [2021-11-07 07:46:28,618 INFO L786 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 [2021-11-07 07:46:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23196 states. [2021-11-07 07:46:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23196 to 22404. [2021-11-07 07:46:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22404 states, 22403 states have (on average 1.1934115966611614) internal successors, (26736), 22403 states have internal predecessors, (26736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22404 states to 22404 states and 26736 transitions. [2021-11-07 07:46:29,017 INFO L78 Accepts]: Start accepts. Automaton has 22404 states and 26736 transitions. Word has length 229 [2021-11-07 07:46:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:29,018 INFO L470 AbstractCegarLoop]: Abstraction has 22404 states and 26736 transitions. [2021-11-07 07:46:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 22404 states and 26736 transitions. [2021-11-07 07:46:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-07 07:46:29,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:29,024 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 07:46:29,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:46:29,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -142749065, now seen corresponding path program 1 times [2021-11-07 07:46:29,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:29,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360741881] [2021-11-07 07:46:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:29,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-07 07:46:29,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:29,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360741881] [2021-11-07 07:46:29,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360741881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:29,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:29,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:46:29,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997528608] [2021-11-07 07:46:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:29,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:29,166 INFO L87 Difference]: Start difference. First operand 22404 states and 26736 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:32,380 INFO L93 Difference]: Finished difference Result 44019 states and 52673 transitions. [2021-11-07 07:46:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-11-07 07:46:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:32,415 INFO L225 Difference]: With dead ends: 44019 [2021-11-07 07:46:32,416 INFO L226 Difference]: Without dead ends: 22404 [2021-11-07 07:46:32,437 INFO L786 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 [2021-11-07 07:46:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22404 states. [2021-11-07 07:46:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22404 to 22404. [2021-11-07 07:46:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22404 states, 22403 states have (on average 1.1931884122662144) internal successors, (26731), 22403 states have internal predecessors, (26731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22404 states to 22404 states and 26731 transitions. [2021-11-07 07:46:32,739 INFO L78 Accepts]: Start accepts. Automaton has 22404 states and 26731 transitions. Word has length 244 [2021-11-07 07:46:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:32,740 INFO L470 AbstractCegarLoop]: Abstraction has 22404 states and 26731 transitions. [2021-11-07 07:46:32,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 22404 states and 26731 transitions. [2021-11-07 07:46:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-07 07:46:32,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:32,745 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:32,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:46:32,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:32,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1521446496, now seen corresponding path program 1 times [2021-11-07 07:46:32,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:32,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403717104] [2021-11-07 07:46:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:32,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 07:46:32,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:32,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403717104] [2021-11-07 07:46:32,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403717104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:32,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:32,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:32,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052760498] [2021-11-07 07:46:32,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:32,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:32,880 INFO L87 Difference]: Start difference. First operand 22404 states and 26731 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:36,556 INFO L93 Difference]: Finished difference Result 55046 states and 66948 transitions. [2021-11-07 07:46:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-07 07:46:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:36,592 INFO L225 Difference]: With dead ends: 55046 [2021-11-07 07:46:36,592 INFO L226 Difference]: Without dead ends: 33431 [2021-11-07 07:46:36,608 INFO L786 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 [2021-11-07 07:46:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2021-11-07 07:46:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 32635. [2021-11-07 07:46:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32635 states, 32634 states have (on average 1.176135318992462) internal successors, (38382), 32634 states have internal predecessors, (38382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32635 states to 32635 states and 38382 transitions. [2021-11-07 07:46:37,014 INFO L78 Accepts]: Start accepts. Automaton has 32635 states and 38382 transitions. Word has length 251 [2021-11-07 07:46:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:37,014 INFO L470 AbstractCegarLoop]: Abstraction has 32635 states and 38382 transitions. [2021-11-07 07:46:37,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32635 states and 38382 transitions. [2021-11-07 07:46:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-07 07:46:37,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:37,021 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:37,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:46:37,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash -406385595, now seen corresponding path program 1 times [2021-11-07 07:46:37,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:37,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832541482] [2021-11-07 07:46:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:37,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-07 07:46:37,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:37,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832541482] [2021-11-07 07:46:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832541482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:37,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:37,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:37,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669824421] [2021-11-07 07:46:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:37,161 INFO L87 Difference]: Start difference. First operand 32635 states and 38382 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:41,050 INFO L93 Difference]: Finished difference Result 76294 states and 91193 transitions. [2021-11-07 07:46:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 306 [2021-11-07 07:46:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:41,097 INFO L225 Difference]: With dead ends: 76294 [2021-11-07 07:46:41,097 INFO L226 Difference]: Without dead ends: 44448 [2021-11-07 07:46:41,116 INFO L786 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 [2021-11-07 07:46:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44448 states. [2021-11-07 07:46:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44448 to 43657. [2021-11-07 07:46:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43657 states, 43656 states have (on average 1.151663001649258) internal successors, (50277), 43656 states have internal predecessors, (50277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43657 states to 43657 states and 50277 transitions. [2021-11-07 07:46:41,604 INFO L78 Accepts]: Start accepts. Automaton has 43657 states and 50277 transitions. Word has length 306 [2021-11-07 07:46:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 43657 states and 50277 transitions. [2021-11-07 07:46:41,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 43657 states and 50277 transitions. [2021-11-07 07:46:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-07 07:46:41,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:41,613 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:46:41,613 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 624236473, now seen corresponding path program 1 times [2021-11-07 07:46:41,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:41,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261075491] [2021-11-07 07:46:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 157 proven. 110 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 07:46:41,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261075491] [2021-11-07 07:46:41,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261075491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:46:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55269805] [2021-11-07 07:46:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:41,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:46:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:46:41,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:46:41,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:46:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:46:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:46:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-07 07:46:43,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55269805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:43,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:46:43,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-07 07:46:43,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497814349] [2021-11-07 07:46:43,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:43,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:46:43,050 INFO L87 Difference]: Start difference. First operand 43657 states and 50277 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:46,601 INFO L93 Difference]: Finished difference Result 86516 states and 99752 transitions. [2021-11-07 07:46:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 321 [2021-11-07 07:46:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:46,646 INFO L225 Difference]: With dead ends: 86516 [2021-11-07 07:46:46,646 INFO L226 Difference]: Without dead ends: 43648 [2021-11-07 07:46:46,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:46:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43648 states. [2021-11-07 07:46:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43648 to 43647. [2021-11-07 07:46:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43647 states, 43646 states have (on average 1.1132749851074555) internal successors, (48590), 43646 states have internal predecessors, (48590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43647 states to 43647 states and 48590 transitions. [2021-11-07 07:46:47,081 INFO L78 Accepts]: Start accepts. Automaton has 43647 states and 48590 transitions. Word has length 321 [2021-11-07 07:46:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:47,082 INFO L470 AbstractCegarLoop]: Abstraction has 43647 states and 48590 transitions. [2021-11-07 07:46:47,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 43647 states and 48590 transitions. [2021-11-07 07:46:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-07 07:46:47,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:47,090 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:47,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 07:46:47,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:46:47,307 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1590721991, now seen corresponding path program 1 times [2021-11-07 07:46:47,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:47,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470236094] [2021-11-07 07:46:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:47,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-11-07 07:46:47,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470236094] [2021-11-07 07:46:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470236094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:47,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:47,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:47,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465709606] [2021-11-07 07:46:47,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:46:47,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:46:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:46:47,483 INFO L87 Difference]: Start difference. First operand 43647 states and 48590 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:51,412 INFO L93 Difference]: Finished difference Result 93579 states and 104978 transitions. [2021-11-07 07:46:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:46:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 340 [2021-11-07 07:46:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:51,468 INFO L225 Difference]: With dead ends: 93579 [2021-11-07 07:46:51,468 INFO L226 Difference]: Without dead ends: 50721 [2021-11-07 07:46:51,493 INFO L786 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 [2021-11-07 07:46:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50721 states. [2021-11-07 07:46:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50721 to 50720. [2021-11-07 07:46:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50720 states, 50719 states have (on average 1.097557128492281) internal successors, (55667), 50719 states have internal predecessors, (55667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50720 states to 50720 states and 55667 transitions. [2021-11-07 07:46:51,941 INFO L78 Accepts]: Start accepts. Automaton has 50720 states and 55667 transitions. Word has length 340 [2021-11-07 07:46:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:46:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 50720 states and 55667 transitions. [2021-11-07 07:46:51,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 50720 states and 55667 transitions. [2021-11-07 07:46:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-07 07:46:51,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:46:51,950 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:46:51,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:46:51,951 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:46:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:46:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1684613318, now seen corresponding path program 1 times [2021-11-07 07:46:51,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:46:51,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406927892] [2021-11-07 07:46:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:46:51,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:46:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:46:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 07:46:52,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:46:52,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406927892] [2021-11-07 07:46:52,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406927892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:46:52,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:46:52,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:46:52,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132807554] [2021-11-07 07:46:52,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:46:52,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:46:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:46:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:46:52,090 INFO L87 Difference]: Start difference. First operand 50720 states and 55667 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:46:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:46:59,533 INFO L93 Difference]: Finished difference Result 167739 states and 183936 transitions. [2021-11-07 07:46:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:46:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2021-11-07 07:46:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:46:59,653 INFO L225 Difference]: With dead ends: 167739 [2021-11-07 07:46:59,653 INFO L226 Difference]: Without dead ends: 117808 [2021-11-07 07:46:59,680 INFO L786 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 [2021-11-07 07:46:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117808 states. [2021-11-07 07:47:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117808 to 115334. [2021-11-07 07:47:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115334 states, 115333 states have (on average 1.087754588886095) internal successors, (125454), 115333 states have internal predecessors, (125454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115334 states to 115334 states and 125454 transitions. [2021-11-07 07:47:01,340 INFO L78 Accepts]: Start accepts. Automaton has 115334 states and 125454 transitions. Word has length 363 [2021-11-07 07:47:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:01,341 INFO L470 AbstractCegarLoop]: Abstraction has 115334 states and 125454 transitions. [2021-11-07 07:47:01,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 115334 states and 125454 transitions. [2021-11-07 07:47:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-07 07:47:01,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:01,383 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:01,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:47:01,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1234351376, now seen corresponding path program 1 times [2021-11-07 07:47:01,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:01,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977478987] [2021-11-07 07:47:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:01,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 326 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-07 07:47:01,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:01,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977478987] [2021-11-07 07:47:01,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977478987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:47:01,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299828698] [2021-11-07 07:47:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:01,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:47:01,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:47:02,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:47:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:47:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:47:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-07 07:47:04,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299828698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:04,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:47:04,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-07 07:47:04,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071754553] [2021-11-07 07:47:04,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:47:04,164 INFO L87 Difference]: Start difference. First operand 115334 states and 125454 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:07,878 INFO L93 Difference]: Finished difference Result 224374 states and 244427 transitions. [2021-11-07 07:47:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 406 [2021-11-07 07:47:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:08,066 INFO L225 Difference]: With dead ends: 224374 [2021-11-07 07:47:08,066 INFO L226 Difference]: Without dead ends: 119279 [2021-11-07 07:47:08,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:47:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119279 states. [2021-11-07 07:47:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119279 to 117695. [2021-11-07 07:47:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117695 states, 117694 states have (on average 1.0789504987509984) internal successors, (126986), 117694 states have internal predecessors, (126986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117695 states to 117695 states and 126986 transitions. [2021-11-07 07:47:09,920 INFO L78 Accepts]: Start accepts. Automaton has 117695 states and 126986 transitions. Word has length 406 [2021-11-07 07:47:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:09,920 INFO L470 AbstractCegarLoop]: Abstraction has 117695 states and 126986 transitions. [2021-11-07 07:47:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 117695 states and 126986 transitions. [2021-11-07 07:47:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-11-07 07:47:09,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:09,958 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:10,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:47:10,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f35da2e-d5b9-4715-9f8b-3fad2197e65a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:47:10,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 863507, now seen corresponding path program 1 times [2021-11-07 07:47:10,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:10,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248499511] [2021-11-07 07:47:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:10,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 667 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-07 07:47:10,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:10,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248499511] [2021-11-07 07:47:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248499511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:10,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:10,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:47:10,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589055869] [2021-11-07 07:47:10,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:10,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:10,359 INFO L87 Difference]: Start difference. First operand 117695 states and 126986 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:14,472 INFO L93 Difference]: Finished difference Result 236180 states and 254773 transitions. [2021-11-07 07:47:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 452 [2021-11-07 07:47:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:14,620 INFO L225 Difference]: With dead ends: 236180 [2021-11-07 07:47:14,620 INFO L226 Difference]: Without dead ends: 119274 [2021-11-07 07:47:14,670 INFO L786 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 [2021-11-07 07:47:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119274 states. [2021-11-07 07:47:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119274 to 117685. [2021-11-07 07:47:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117685 states, 117684 states have (on average 1.0659053057339996) internal successors, (125440), 117684 states have internal predecessors, (125440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117685 states to 117685 states and 125440 transitions. [2021-11-07 07:47:16,092 INFO L78 Accepts]: Start accepts. Automaton has 117685 states and 125440 transitions. Word has length 452 [2021-11-07 07:47:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:16,092 INFO L470 AbstractCegarLoop]: Abstraction has 117685 states and 125440 transitions. [2021-11-07 07:47:16,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 117685 states and 125440 transitions. [2021-11-07 07:47:16,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-07 07:47:16,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:16,100 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:16,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:47:16,102 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1364798383, now seen corresponding path program 1 times [2021-11-07 07:47:16,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:16,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583884196] [2021-11-07 07:47:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:16,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-07 07:47:16,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:16,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583884196] [2021-11-07 07:47:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583884196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:16,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:16,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:47:16,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693190141] [2021-11-07 07:47:16,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:16,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:16,750 INFO L87 Difference]: Start difference. First operand 117685 states and 125440 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:21,441 INFO L93 Difference]: Finished difference Result 259759 states and 277507 transitions. [2021-11-07 07:47:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 476 [2021-11-07 07:47:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:21,637 INFO L225 Difference]: With dead ends: 259759 [2021-11-07 07:47:21,637 INFO L226 Difference]: Without dead ends: 142863 [2021-11-07 07:47:21,692 INFO L786 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 [2021-11-07 07:47:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142863 states. [2021-11-07 07:47:23,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142863 to 141273. [2021-11-07 07:47:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141273 states, 141272 states have (on average 1.0587943824678634) internal successors, (149578), 141272 states have internal predecessors, (149578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141273 states to 141273 states and 149578 transitions. [2021-11-07 07:47:23,771 INFO L78 Accepts]: Start accepts. Automaton has 141273 states and 149578 transitions. Word has length 476 [2021-11-07 07:47:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:23,772 INFO L470 AbstractCegarLoop]: Abstraction has 141273 states and 149578 transitions. [2021-11-07 07:47:23,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 141273 states and 149578 transitions. [2021-11-07 07:47:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-11-07 07:47:23,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:23,785 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:23,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:47:23,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash -942422012, now seen corresponding path program 1 times [2021-11-07 07:47:23,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:23,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993663540] [2021-11-07 07:47:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:23,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-11-07 07:47:24,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:24,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993663540] [2021-11-07 07:47:24,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993663540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:24,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:24,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:47:24,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133686629] [2021-11-07 07:47:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:24,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:24,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:24,005 INFO L87 Difference]: Start difference. First operand 141273 states and 149578 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:28,093 INFO L93 Difference]: Finished difference Result 266782 states and 282940 transitions. [2021-11-07 07:47:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 493 [2021-11-07 07:47:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:28,353 INFO L225 Difference]: With dead ends: 266782 [2021-11-07 07:47:28,353 INFO L226 Difference]: Without dead ends: 139683 [2021-11-07 07:47:28,432 INFO L786 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 [2021-11-07 07:47:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139683 states. [2021-11-07 07:47:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139683 to 139682. [2021-11-07 07:47:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139682 states, 139681 states have (on average 1.0581825731488177) internal successors, (147808), 139681 states have internal predecessors, (147808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139682 states to 139682 states and 147808 transitions. [2021-11-07 07:47:30,389 INFO L78 Accepts]: Start accepts. Automaton has 139682 states and 147808 transitions. Word has length 493 [2021-11-07 07:47:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 139682 states and 147808 transitions. [2021-11-07 07:47:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 139682 states and 147808 transitions. [2021-11-07 07:47:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2021-11-07 07:47:30,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:30,403 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:30,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:47:30,403 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 84700328, now seen corresponding path program 1 times [2021-11-07 07:47:30,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:30,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241774987] [2021-11-07 07:47:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:30,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-07 07:47:31,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:31,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241774987] [2021-11-07 07:47:31,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241774987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:31,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:31,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:47:31,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147921440] [2021-11-07 07:47:31,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:31,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:31,178 INFO L87 Difference]: Start difference. First operand 139682 states and 147808 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:36,089 INFO L93 Difference]: Finished difference Result 278577 states and 294767 transitions. [2021-11-07 07:47:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:36,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 495 [2021-11-07 07:47:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:36,289 INFO L225 Difference]: With dead ends: 278577 [2021-11-07 07:47:36,289 INFO L226 Difference]: Without dead ends: 138110 [2021-11-07 07:47:36,348 INFO L786 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 [2021-11-07 07:47:36,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138110 states. [2021-11-07 07:47:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138110 to 136521. [2021-11-07 07:47:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136521 states, 136520 states have (on average 1.0459493114561969) internal successors, (142793), 136520 states have internal predecessors, (142793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136521 states to 136521 states and 142793 transitions. [2021-11-07 07:47:38,383 INFO L78 Accepts]: Start accepts. Automaton has 136521 states and 142793 transitions. Word has length 495 [2021-11-07 07:47:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 136521 states and 142793 transitions. [2021-11-07 07:47:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 136521 states and 142793 transitions. [2021-11-07 07:47:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-07 07:47:38,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:38,399 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:47:38,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:47:38,399 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash -230342840, now seen corresponding path program 1 times [2021-11-07 07:47:38,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:38,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863661493] [2021-11-07 07:47:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:38,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-07 07:47:38,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:38,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863661493] [2021-11-07 07:47:38,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863661493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:38,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:38,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:47:38,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201580193] [2021-11-07 07:47:38,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:38,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:38,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:38,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:38,670 INFO L87 Difference]: Start difference. First operand 136521 states and 142793 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:44,834 INFO L93 Difference]: Finished difference Result 310061 states and 325155 transitions. [2021-11-07 07:47:44,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:44,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 504 [2021-11-07 07:47:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:45,069 INFO L225 Difference]: With dead ends: 310061 [2021-11-07 07:47:45,069 INFO L226 Difference]: Without dead ends: 187714 [2021-11-07 07:47:45,106 INFO L786 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 [2021-11-07 07:47:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187714 states. [2021-11-07 07:47:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187714 to 187710. [2021-11-07 07:47:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187710 states, 187709 states have (on average 1.0428642206820131) internal successors, (195755), 187709 states have internal predecessors, (195755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187710 states to 187710 states and 195755 transitions. [2021-11-07 07:47:48,150 INFO L78 Accepts]: Start accepts. Automaton has 187710 states and 195755 transitions. Word has length 504 [2021-11-07 07:47:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:47:48,150 INFO L470 AbstractCegarLoop]: Abstraction has 187710 states and 195755 transitions. [2021-11-07 07:47:48,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 187710 states and 195755 transitions. [2021-11-07 07:47:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-07 07:47:48,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:47:48,160 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-11-07 07:47:48,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:47:48,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:47:48,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:47:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1350760183, now seen corresponding path program 1 times [2021-11-07 07:47:48,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:47:48,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897722595] [2021-11-07 07:47:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:47:48,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:47:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:47:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2021-11-07 07:47:48,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:47:48,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897722595] [2021-11-07 07:47:48,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897722595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:47:48,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:47:48,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:47:48,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512900070] [2021-11-07 07:47:48,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:47:48,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:47:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:47:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:47:48,461 INFO L87 Difference]: Start difference. First operand 187710 states and 195755 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:47:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:47:54,331 INFO L93 Difference]: Finished difference Result 393578 states and 410582 transitions. [2021-11-07 07:47:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:47:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 507 [2021-11-07 07:47:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:47:54,638 INFO L225 Difference]: With dead ends: 393578 [2021-11-07 07:47:54,638 INFO L226 Difference]: Without dead ends: 220042 [2021-11-07 07:47:54,714 INFO L786 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 [2021-11-07 07:47:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220042 states. [2021-11-07 07:47:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220042 to 202674. [2021-11-07 07:47:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202674 states, 202673 states have (on average 1.0422552584705411) internal successors, (211237), 202673 states have internal predecessors, (211237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)