./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF --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 c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:33:14,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:33:14,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:33:15,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:33:15,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:33:15,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:33:15,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:33:15,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:33:15,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:33:15,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:33:15,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:33:15,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:33:15,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:33:15,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:33:15,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:33:15,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:33:15,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:33:15,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:33:15,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:33:15,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:33:15,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:33:15,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:33:15,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:33:15,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:33:15,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:33:15,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:33:15,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:33:15,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:33:15,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:33:15,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:33:15,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:33:15,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:33:15,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:33:15,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:33:15,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:33:15,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:33:15,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:33:15,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:33:15,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:33:15,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:33:15,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:33:15,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:33:15,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:33:15,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:33:15,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:33:15,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:33:15,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:33:15,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:33:15,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:33:15,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:33:15,148 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:33:15,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:33:15,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:33:15,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:33:15,149 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:33:15,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:33:15,150 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:33:15,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:33:15,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:33:15,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:33:15,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:33:15,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:33:15,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:33:15,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:33:15,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:33:15,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:33:15,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:33:15,152 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:33:15,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:33:15,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:33:15,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:33:15,153 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_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd [2021-11-20 05:33:15,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:33:15,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:33:15,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:33:15,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:33:15,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:33:15,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-11-20 05:33:15,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/data/9f3259ad3/6715e704e9434072bcae4fb650e019fd/FLAGa61eee55d [2021-11-20 05:33:16,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:33:16,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-11-20 05:33:16,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/data/9f3259ad3/6715e704e9434072bcae4fb650e019fd/FLAGa61eee55d [2021-11-20 05:33:16,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/data/9f3259ad3/6715e704e9434072bcae4fb650e019fd [2021-11-20 05:33:16,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:33:16,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:33:16,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:33:16,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:33:16,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:33:16,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:33:16" (1/1) ... [2021-11-20 05:33:16,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546c8963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:16, skipping insertion in model container [2021-11-20 05:33:16,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:33:16" (1/1) ... [2021-11-20 05:33:16,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:33:17,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:33:17,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/sv-benchmarks/c/eca-rers2012/Problem12_label15.c[6730,6743] [2021-11-20 05:33:18,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:33:18,486 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:33:18,516 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/sv-benchmarks/c/eca-rers2012/Problem12_label15.c[6730,6743] [2021-11-20 05:33:19,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:33:19,131 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:33:19,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19 WrapperNode [2021-11-20 05:33:19,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:33:19,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:33:19,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:33:19,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:33:19,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:19,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:19,590 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-11-20 05:33:19,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:33:19,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:33:19,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:33:19,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:33:19,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:19,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:19,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:19,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:20,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:20,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:20,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:20,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:33:20,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:33:20,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:33:20,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:33:20,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (1/1) ... [2021-11-20 05:33:20,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:33:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:20,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:33:20,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:33:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:33:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:33:20,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:33:20,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:33:20,417 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:33:20,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:33:24,979 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:33:24,998 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:33:24,998 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:33:25,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:33:25 BoogieIcfgContainer [2021-11-20 05:33:25,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:33:25,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:33:25,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:33:25,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:33:25,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:33:16" (1/3) ... [2021-11-20 05:33:25,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77eece2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:33:25, skipping insertion in model container [2021-11-20 05:33:25,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:33:19" (2/3) ... [2021-11-20 05:33:25,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77eece2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:33:25, skipping insertion in model container [2021-11-20 05:33:25,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:33:25" (3/3) ... [2021-11-20 05:33:25,010 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label15.c [2021-11-20 05:33:25,016 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:33:25,016 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:33:25,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:33:25,078 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 [2021-11-20 05:33:25,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:33:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 05:33:25,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:25,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:25,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-20 05:33:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780607270] [2021-11-20 05:33:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:25,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:25,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780607270] [2021-11-20 05:33:25,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780607270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:25,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:25,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:25,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074808803] [2021-11-20 05:33:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:25,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:33:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:33:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:33:25,532 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:31,939 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2021-11-20 05:33:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:33:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-20 05:33:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:31,984 INFO L225 Difference]: With dead ends: 3155 [2021-11-20 05:33:31,984 INFO L226 Difference]: Without dead ends: 2265 [2021-11-20 05:33:32,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:33:32,004 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2383 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:32,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 234 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 05:33:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-20 05:33:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2021-11-20 05:33:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2021-11-20 05:33:32,179 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 54 [2021-11-20 05:33:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:32,180 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2021-11-20 05:33:32,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2021-11-20 05:33:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 05:33:32,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:32,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:33:32,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:33:32,201 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -653035601, now seen corresponding path program 1 times [2021-11-20 05:33:32,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:32,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457813244] [2021-11-20 05:33:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:32,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:33:32,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457813244] [2021-11-20 05:33:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457813244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:32,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:32,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:32,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878233739] [2021-11-20 05:33:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:32,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:33:32,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:33:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:33:32,496 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:36,942 INFO L93 Difference]: Finished difference Result 6051 states and 9664 transitions. [2021-11-20 05:33:36,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:33:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 194 [2021-11-20 05:33:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:36,966 INFO L225 Difference]: With dead ends: 6051 [2021-11-20 05:33:36,966 INFO L226 Difference]: Without dead ends: 3759 [2021-11-20 05:33:36,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:33:36,972 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:36,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 05:33:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-20 05:33:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-11-20 05:33:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3408728046833422) internal successors, (5039), 3758 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5039 transitions. [2021-11-20 05:33:37,087 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5039 transitions. Word has length 194 [2021-11-20 05:33:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:37,091 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5039 transitions. [2021-11-20 05:33:37,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5039 transitions. [2021-11-20 05:33:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-20 05:33:37,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:37,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:33:37,105 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:37,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1501609534, now seen corresponding path program 1 times [2021-11-20 05:33:37,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:37,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802491201] [2021-11-20 05:33:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:37,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:33:37,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802491201] [2021-11-20 05:33:37,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802491201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:37,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:37,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:33:37,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396825175] [2021-11-20 05:33:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:37,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:37,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:37,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:37,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:37,473 INFO L87 Difference]: Start difference. First operand 3759 states and 5039 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:40,343 INFO L93 Difference]: Finished difference Result 10520 states and 14356 transitions. [2021-11-20 05:33:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:33:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 264 [2021-11-20 05:33:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:40,385 INFO L225 Difference]: With dead ends: 10520 [2021-11-20 05:33:40,385 INFO L226 Difference]: Without dead ends: 6763 [2021-11-20 05:33:40,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:40,393 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 669 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:40,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 486 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 05:33:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-11-20 05:33:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6012. [2021-11-20 05:33:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.2814839460988188) internal successors, (7703), 6011 states have internal predecessors, (7703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7703 transitions. [2021-11-20 05:33:40,559 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7703 transitions. Word has length 264 [2021-11-20 05:33:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:40,562 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 7703 transitions. [2021-11-20 05:33:40,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7703 transitions. [2021-11-20 05:33:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-20 05:33:40,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:40,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:33:40,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash -436238599, now seen corresponding path program 1 times [2021-11-20 05:33:40,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587524204] [2021-11-20 05:33:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:40,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 103 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 05:33:40,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587524204] [2021-11-20 05:33:40,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587524204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:40,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191450443] [2021-11-20 05:33:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:40,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:40,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:40,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:40,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:33:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:33:41,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:41,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:33:41,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191450443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:41,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:33:41,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 05:33:41,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471132787] [2021-11-20 05:33:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:41,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:41,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:33:41,749 INFO L87 Difference]: Start difference. First operand 6012 states and 7703 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:44,992 INFO L93 Difference]: Finished difference Result 15026 states and 19934 transitions. [2021-11-20 05:33:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:33:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2021-11-20 05:33:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:45,036 INFO L225 Difference]: With dead ends: 15026 [2021-11-20 05:33:45,036 INFO L226 Difference]: Without dead ends: 9016 [2021-11-20 05:33:45,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:33:45,046 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 908 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:45,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 05:33:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2021-11-20 05:33:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016. [2021-11-20 05:33:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 9015 states have (on average 1.2657792567942319) internal successors, (11411), 9015 states have internal predecessors, (11411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11411 transitions. [2021-11-20 05:33:45,261 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 11411 transitions. Word has length 277 [2021-11-20 05:33:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 9016 states and 11411 transitions. [2021-11-20 05:33:45,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 11411 transitions. [2021-11-20 05:33:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-20 05:33:45,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:45,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:45,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:45,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:45,482 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -829867597, now seen corresponding path program 1 times [2021-11-20 05:33:45,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:45,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846885397] [2021-11-20 05:33:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:45,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-20 05:33:45,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846885397] [2021-11-20 05:33:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846885397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:45,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:45,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:45,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853052775] [2021-11-20 05:33:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:45,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:45,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:45,678 INFO L87 Difference]: Start difference. First operand 9016 states and 11411 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:49,391 INFO L93 Difference]: Finished difference Result 25540 states and 32713 transitions. [2021-11-20 05:33:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:33:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 294 [2021-11-20 05:33:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:49,444 INFO L225 Difference]: With dead ends: 25540 [2021-11-20 05:33:49,445 INFO L226 Difference]: Without dead ends: 16526 [2021-11-20 05:33:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:49,459 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:49,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1325 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 05:33:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-11-20 05:33:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15775. [2021-11-20 05:33:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2523773297831875) internal successors, (19755), 15774 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19755 transitions. [2021-11-20 05:33:49,807 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19755 transitions. Word has length 294 [2021-11-20 05:33:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:49,808 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19755 transitions. [2021-11-20 05:33:49,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19755 transitions. [2021-11-20 05:33:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-20 05:33:49,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:49,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:49,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:33:49,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1769336259, now seen corresponding path program 1 times [2021-11-20 05:33:49,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:49,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145312375] [2021-11-20 05:33:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:49,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 05:33:50,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145312375] [2021-11-20 05:33:50,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145312375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:50,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:50,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:50,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156940757] [2021-11-20 05:33:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:50,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:50,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:50,102 INFO L87 Difference]: Start difference. First operand 15775 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:53,617 INFO L93 Difference]: Finished difference Result 38307 states and 48288 transitions. [2021-11-20 05:33:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:33:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 343 [2021-11-20 05:33:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:53,665 INFO L225 Difference]: With dead ends: 38307 [2021-11-20 05:33:53,666 INFO L226 Difference]: Without dead ends: 22534 [2021-11-20 05:33:53,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:53,693 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:53,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 05:33:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-11-20 05:33:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-11-20 05:33:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2340567168153376) internal successors, (27807), 22533 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27807 transitions. [2021-11-20 05:33:54,064 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27807 transitions. Word has length 343 [2021-11-20 05:33:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27807 transitions. [2021-11-20 05:33:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27807 transitions. [2021-11-20 05:33:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-20 05:33:54,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:54,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:54,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:33:54,075 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1851360552, now seen corresponding path program 1 times [2021-11-20 05:33:54,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658023288] [2021-11-20 05:33:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:54,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 05:33:54,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658023288] [2021-11-20 05:33:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658023288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:54,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:54,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:54,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838066381] [2021-11-20 05:33:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:54,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:54,329 INFO L87 Difference]: Start difference. First operand 22534 states and 27807 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:57,492 INFO L93 Difference]: Finished difference Result 45066 states and 55612 transitions. [2021-11-20 05:33:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:33:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 348 [2021-11-20 05:33:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:57,537 INFO L225 Difference]: With dead ends: 45066 [2021-11-20 05:33:57,537 INFO L226 Difference]: Without dead ends: 22534 [2021-11-20 05:33:57,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:57,560 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 737 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:57,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 187 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 05:33:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-11-20 05:33:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-11-20 05:33:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2210091865264279) internal successors, (27513), 22533 states have internal predecessors, (27513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27513 transitions. [2021-11-20 05:33:57,887 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27513 transitions. Word has length 348 [2021-11-20 05:33:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:57,888 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27513 transitions. [2021-11-20 05:33:57,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27513 transitions. [2021-11-20 05:33:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-20 05:33:57,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:57,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:33:57,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:33:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -14553240, now seen corresponding path program 1 times [2021-11-20 05:33:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:57,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366291176] [2021-11-20 05:33:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:57,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-20 05:33:58,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:58,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366291176] [2021-11-20 05:33:58,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366291176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:33:58,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:33:58,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:33:58,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110474543] [2021-11-20 05:33:58,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:33:58,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:33:58,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:33:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:33:58,050 INFO L87 Difference]: Start difference. First operand 22534 states and 27513 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:01,299 INFO L93 Difference]: Finished difference Result 60837 states and 75395 transitions. [2021-11-20 05:34:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 359 [2021-11-20 05:34:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:01,342 INFO L225 Difference]: With dead ends: 60837 [2021-11-20 05:34:01,342 INFO L226 Difference]: Without dead ends: 38305 [2021-11-20 05:34:01,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:01,362 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 722 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:01,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 424 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 05:34:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2021-11-20 05:34:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2021-11-20 05:34:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 1.2043650793650793) internal successors, (46132), 38304 states have internal predecessors, (46132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 46132 transitions. [2021-11-20 05:34:01,877 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 46132 transitions. Word has length 359 [2021-11-20 05:34:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 46132 transitions. [2021-11-20 05:34:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 46132 transitions. [2021-11-20 05:34:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-11-20 05:34:01,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:01,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:01,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 05:34:01,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1763235576, now seen corresponding path program 1 times [2021-11-20 05:34:01,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975354939] [2021-11-20 05:34:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:01,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 339 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:34:02,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:02,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975354939] [2021-11-20 05:34:02,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975354939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:02,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185683481] [2021-11-20 05:34:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:02,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:02,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:02,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:02,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:34:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:34:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 240 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 05:34:03,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:34:04,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185683481] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:04,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:04,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2021-11-20 05:34:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499066563] [2021-11-20 05:34:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:04,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:04,005 INFO L87 Difference]: Start difference. First operand 38305 states and 46132 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:07,689 INFO L93 Difference]: Finished difference Result 87122 states and 105286 transitions. [2021-11-20 05:34:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 385 [2021-11-20 05:34:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:07,737 INFO L225 Difference]: With dead ends: 87122 [2021-11-20 05:34:07,737 INFO L226 Difference]: Without dead ends: 48819 [2021-11-20 05:34:07,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:07,762 INFO L933 BasicCegarLoop]: 1135 mSDtfsCounter, 749 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:07,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1143 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 05:34:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2021-11-20 05:34:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 48068. [2021-11-20 05:34:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48068 states, 48067 states have (on average 1.180976553560655) internal successors, (56766), 48067 states have internal predecessors, (56766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48068 states to 48068 states and 56766 transitions. [2021-11-20 05:34:08,482 INFO L78 Accepts]: Start accepts. Automaton has 48068 states and 56766 transitions. Word has length 385 [2021-11-20 05:34:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:08,484 INFO L470 AbstractCegarLoop]: Abstraction has 48068 states and 56766 transitions. [2021-11-20 05:34:08,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 48068 states and 56766 transitions. [2021-11-20 05:34:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-20 05:34:08,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:08,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:08,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:08,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -352558693, now seen corresponding path program 1 times [2021-11-20 05:34:08,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:08,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117500768] [2021-11-20 05:34:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:08,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 05:34:08,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117500768] [2021-11-20 05:34:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117500768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:08,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:08,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:08,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312324922] [2021-11-20 05:34:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:08,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:08,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:08,914 INFO L87 Difference]: Start difference. First operand 48068 states and 56766 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:12,563 INFO L93 Difference]: Finished difference Result 110403 states and 129457 transitions. [2021-11-20 05:34:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 438 [2021-11-20 05:34:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:12,637 INFO L225 Difference]: With dead ends: 110403 [2021-11-20 05:34:12,637 INFO L226 Difference]: Without dead ends: 62337 [2021-11-20 05:34:12,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:12,660 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 682 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 2682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:12,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1319 Invalid, 2682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 05:34:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2021-11-20 05:34:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 59333. [2021-11-20 05:34:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59333 states, 59332 states have (on average 1.14420548776377) internal successors, (67888), 59332 states have internal predecessors, (67888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59333 states to 59333 states and 67888 transitions. [2021-11-20 05:34:13,759 INFO L78 Accepts]: Start accepts. Automaton has 59333 states and 67888 transitions. Word has length 438 [2021-11-20 05:34:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 59333 states and 67888 transitions. [2021-11-20 05:34:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59333 states and 67888 transitions. [2021-11-20 05:34:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-11-20 05:34:13,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:13,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:13,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 05:34:13,776 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash 258597530, now seen corresponding path program 1 times [2021-11-20 05:34:13,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:13,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948215796] [2021-11-20 05:34:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:34:14,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:14,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948215796] [2021-11-20 05:34:14,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948215796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:14,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:14,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:14,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170244013] [2021-11-20 05:34:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:14,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:14,148 INFO L87 Difference]: Start difference. First operand 59333 states and 67888 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:17,338 INFO L93 Difference]: Finished difference Result 132182 states and 150444 transitions. [2021-11-20 05:34:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 450 [2021-11-20 05:34:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:17,436 INFO L225 Difference]: With dead ends: 132182 [2021-11-20 05:34:17,436 INFO L226 Difference]: Without dead ends: 72851 [2021-11-20 05:34:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:17,464 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 805 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:17,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 910 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 05:34:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72851 states. [2021-11-20 05:34:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72851 to 67594. [2021-11-20 05:34:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.1184146287337446) internal successors, (75597), 67593 states have internal predecessors, (75597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 75597 transitions. [2021-11-20 05:34:18,632 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 75597 transitions. Word has length 450 [2021-11-20 05:34:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:18,658 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 75597 transitions. [2021-11-20 05:34:18,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 75597 transitions. [2021-11-20 05:34:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-20 05:34:18,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:18,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:18,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:34:18,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2782185, now seen corresponding path program 1 times [2021-11-20 05:34:18,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:18,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288695228] [2021-11-20 05:34:18,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:18,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 155 proven. 108 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-20 05:34:19,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288695228] [2021-11-20 05:34:19,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288695228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656657399] [2021-11-20 05:34:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:19,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:19,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:19,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:34:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:34:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-20 05:34:20,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:20,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656657399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:20,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:34:20,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 05:34:20,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449682470] [2021-11-20 05:34:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:20,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:20,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:34:20,220 INFO L87 Difference]: Start difference. First operand 67594 states and 75597 transitions. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:23,422 INFO L93 Difference]: Finished difference Result 147953 states and 165226 transitions. [2021-11-20 05:34:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 478 [2021-11-20 05:34:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:23,525 INFO L225 Difference]: With dead ends: 147953 [2021-11-20 05:34:23,525 INFO L226 Difference]: Without dead ends: 80361 [2021-11-20 05:34:23,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:34:23,715 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 661 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:23,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 257 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 05:34:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80361 states. [2021-11-20 05:34:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80361 to 80361. [2021-11-20 05:34:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80361 states, 80360 states have (on average 1.0998133399701344) internal successors, (88381), 80360 states have internal predecessors, (88381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80361 states to 80361 states and 88381 transitions. [2021-11-20 05:34:25,001 INFO L78 Accepts]: Start accepts. Automaton has 80361 states and 88381 transitions. Word has length 478 [2021-11-20 05:34:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:25,001 INFO L470 AbstractCegarLoop]: Abstraction has 80361 states and 88381 transitions. [2021-11-20 05:34:25,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 80361 states and 88381 transitions. [2021-11-20 05:34:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-20 05:34:25,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:25,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:25,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 05:34:25,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9c42d4e-1af4-40b7-87dd-9238672c686d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 05:34:25,242 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:25,243 INFO L85 PathProgramCache]: Analyzing trace with hash 487623955, now seen corresponding path program 1 times [2021-11-20 05:34:25,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:25,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648427485] [2021-11-20 05:34:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 635 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 05:34:25,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648427485] [2021-11-20 05:34:25,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648427485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:25,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:25,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:25,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618771326] [2021-11-20 05:34:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:25,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:25,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:25,451 INFO L87 Difference]: Start difference. First operand 80361 states and 88381 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:28,820 INFO L93 Difference]: Finished difference Result 162973 states and 179028 transitions. [2021-11-20 05:34:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 503 [2021-11-20 05:34:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:28,915 INFO L225 Difference]: With dead ends: 162973 [2021-11-20 05:34:28,916 INFO L226 Difference]: Without dead ends: 82614 [2021-11-20 05:34:28,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:28,953 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 794 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:28,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [794 Valid, 232 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 05:34:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2021-11-20 05:34:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 80361. [2021-11-20 05:34:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80361 states, 80360 states have (on average 1.0796789447486312) internal successors, (86763), 80360 states have internal predecessors, (86763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80361 states to 80361 states and 86763 transitions. [2021-11-20 05:34:30,232 INFO L78 Accepts]: Start accepts. Automaton has 80361 states and 86763 transitions. Word has length 503 [2021-11-20 05:34:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:30,233 INFO L470 AbstractCegarLoop]: Abstraction has 80361 states and 86763 transitions. [2021-11-20 05:34:30,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80361 states and 86763 transitions. [2021-11-20 05:34:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-11-20 05:34:30,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:30,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:30,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:34:30,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 88206328, now seen corresponding path program 1 times [2021-11-20 05:34:30,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:30,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10059648] [2021-11-20 05:34:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:30,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 05:34:30,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10059648] [2021-11-20 05:34:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10059648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:30,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:30,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:30,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432194386] [2021-11-20 05:34:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:30,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:30,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:30,562 INFO L87 Difference]: Start difference. First operand 80361 states and 86763 transitions. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:34,355 INFO L93 Difference]: Finished difference Result 160720 states and 173524 transitions. [2021-11-20 05:34:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 516 [2021-11-20 05:34:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:34,436 INFO L225 Difference]: With dead ends: 160720 [2021-11-20 05:34:34,436 INFO L226 Difference]: Without dead ends: 80361 [2021-11-20 05:34:34,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:34,472 INFO L933 BasicCegarLoop]: 1270 mSDtfsCounter, 567 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2236 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 2525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:34,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1278 Invalid, 2525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2236 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 05:34:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80361 states. [2021-11-20 05:34:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80361 to 79610. [2021-11-20 05:34:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.0641510381991985) internal successors, (84716), 79609 states have internal predecessors, (84716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 84716 transitions. [2021-11-20 05:34:35,533 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 84716 transitions. Word has length 516 [2021-11-20 05:34:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:35,533 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 84716 transitions. [2021-11-20 05:34:35,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 84716 transitions. [2021-11-20 05:34:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-11-20 05:34:35,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:35,544 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-20 05:34:35,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:34:35,545 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1452997448, now seen corresponding path program 1 times [2021-11-20 05:34:35,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:35,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991249703] [2021-11-20 05:34:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:35,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-20 05:34:36,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:36,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991249703] [2021-11-20 05:34:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991249703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:36,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:36,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927721018] [2021-11-20 05:34:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:36,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:36,144 INFO L87 Difference]: Start difference. First operand 79610 states and 84716 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:39,786 INFO L93 Difference]: Finished difference Result 192262 states and 204861 transitions. [2021-11-20 05:34:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 534 [2021-11-20 05:34:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:39,904 INFO L225 Difference]: With dead ends: 192262 [2021-11-20 05:34:39,904 INFO L226 Difference]: Without dead ends: 112654 [2021-11-20 05:34:39,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:39,938 INFO L933 BasicCegarLoop]: 1247 mSDtfsCounter, 721 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:39,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 1255 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-20 05:34:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112654 states. [2021-11-20 05:34:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112654 to 99887. [2021-11-20 05:34:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99887 states, 99886 states have (on average 1.0663856796748292) internal successors, (106517), 99886 states have internal predecessors, (106517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99887 states to 99887 states and 106517 transitions. [2021-11-20 05:34:41,291 INFO L78 Accepts]: Start accepts. Automaton has 99887 states and 106517 transitions. Word has length 534 [2021-11-20 05:34:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:41,292 INFO L470 AbstractCegarLoop]: Abstraction has 99887 states and 106517 transitions. [2021-11-20 05:34:41,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 99887 states and 106517 transitions. [2021-11-20 05:34:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-20 05:34:41,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:41,302 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 05:34:41,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:34:41,302 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:41,303 INFO L85 PathProgramCache]: Analyzing trace with hash 666337407, now seen corresponding path program 1 times [2021-11-20 05:34:41,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:41,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062870297] [2021-11-20 05:34:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:41,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 05:34:41,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062870297] [2021-11-20 05:34:41,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062870297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:41,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:41,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:41,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508681002] [2021-11-20 05:34:41,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:41,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:41,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:41,489 INFO L87 Difference]: Start difference. First operand 99887 states and 106517 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:45,071 INFO L93 Difference]: Finished difference Result 205029 states and 218351 transitions. [2021-11-20 05:34:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 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 542 [2021-11-20 05:34:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:45,528 INFO L225 Difference]: With dead ends: 205029 [2021-11-20 05:34:45,528 INFO L226 Difference]: Without dead ends: 104393 [2021-11-20 05:34:45,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:45,554 INFO L933 BasicCegarLoop]: 993 mSDtfsCounter, 761 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:45,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1000 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 05:34:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104393 states. [2021-11-20 05:34:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104393 to 97634. [2021-11-20 05:34:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97634 states, 97633 states have (on average 1.054059590507308) internal successors, (102911), 97633 states have internal predecessors, (102911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97634 states to 97634 states and 102911 transitions. [2021-11-20 05:34:46,814 INFO L78 Accepts]: Start accepts. Automaton has 97634 states and 102911 transitions. Word has length 542 [2021-11-20 05:34:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:46,815 INFO L470 AbstractCegarLoop]: Abstraction has 97634 states and 102911 transitions. [2021-11-20 05:34:46,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 97634 states and 102911 transitions. [2021-11-20 05:34:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-20 05:34:46,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:46,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:46,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 05:34:46,835 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -233656307, now seen corresponding path program 1 times [2021-11-20 05:34:46,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124112100] [2021-11-20 05:34:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:46,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:34:47,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124112100] [2021-11-20 05:34:47,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124112100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:47,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:47,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:47,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747741216] [2021-11-20 05:34:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:47,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:47,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:47,121 INFO L87 Difference]: Start difference. First operand 97634 states and 102911 transitions. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:50,968 INFO L93 Difference]: Finished difference Result 218547 states and 230447 transitions. [2021-11-20 05:34:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:50,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 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 629 [2021-11-20 05:34:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:51,127 INFO L225 Difference]: With dead ends: 218547 [2021-11-20 05:34:51,127 INFO L226 Difference]: Without dead ends: 121666 [2021-11-20 05:34:51,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:51,171 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 674 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:51,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 602 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 05:34:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121666 states. [2021-11-20 05:34:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121666 to 117160. [2021-11-20 05:34:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117160 states, 117159 states have (on average 1.051792862690873) internal successors, (123227), 117159 states have internal predecessors, (123227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117160 states to 117160 states and 123227 transitions. [2021-11-20 05:34:53,199 INFO L78 Accepts]: Start accepts. Automaton has 117160 states and 123227 transitions. Word has length 629 [2021-11-20 05:34:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:53,200 INFO L470 AbstractCegarLoop]: Abstraction has 117160 states and 123227 transitions. [2021-11-20 05:34:53,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 117160 states and 123227 transitions. [2021-11-20 05:34:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-11-20 05:34:53,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:53,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:53,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 05:34:53,213 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 380100970, now seen corresponding path program 1 times [2021-11-20 05:34:53,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113332979] [2021-11-20 05:34:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:53,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-20 05:34:53,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:53,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113332979] [2021-11-20 05:34:53,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113332979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:53,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:53,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:53,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964866126] [2021-11-20 05:34:53,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:53,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:53,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:53,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:53,471 INFO L87 Difference]: Start difference. First operand 117160 states and 123227 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:57,065 INFO L93 Difference]: Finished difference Result 235820 states and 247964 transitions. [2021-11-20 05:34:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:34:57,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 634 [2021-11-20 05:34:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:57,198 INFO L225 Difference]: With dead ends: 235820 [2021-11-20 05:34:57,198 INFO L226 Difference]: Without dead ends: 119413 [2021-11-20 05:34:57,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:57,246 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 815 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:57,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 109 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 05:34:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119413 states. [2021-11-20 05:34:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119413 to 113405. [2021-11-20 05:34:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113405 states, 113404 states have (on average 1.0433406229057176) internal successors, (118319), 113404 states have internal predecessors, (118319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113405 states to 113405 states and 118319 transitions. [2021-11-20 05:34:58,974 INFO L78 Accepts]: Start accepts. Automaton has 113405 states and 118319 transitions. Word has length 634 [2021-11-20 05:34:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 113405 states and 118319 transitions. [2021-11-20 05:34:58,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 113405 states and 118319 transitions. [2021-11-20 05:34:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2021-11-20 05:34:58,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:58,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:58,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 05:34:58,989 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash 629762127, now seen corresponding path program 1 times [2021-11-20 05:34:58,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:58,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137333202] [2021-11-20 05:34:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:58,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 468 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 05:34:59,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137333202] [2021-11-20 05:34:59,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137333202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:59,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:59,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:59,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588368975] [2021-11-20 05:34:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:59,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:34:59,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:59,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:34:59,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:34:59,198 INFO L87 Difference]: Start difference. First operand 113405 states and 118319 transitions. Second operand has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:02,944 INFO L93 Difference]: Finished difference Result 249338 states and 260245 transitions. [2021-11-20 05:35:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 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 681 [2021-11-20 05:35:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:03,080 INFO L225 Difference]: With dead ends: 249338 [2021-11-20 05:35:03,080 INFO L226 Difference]: Without dead ends: 136686 [2021-11-20 05:35:03,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:03,553 INFO L933 BasicCegarLoop]: 1306 mSDtfsCounter, 660 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:03,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 1314 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 05:35:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136686 states. [2021-11-20 05:35:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136686 to 132180. [2021-11-20 05:35:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132180 states, 132179 states have (on average 1.0419658190786736) internal successors, (137726), 132179 states have internal predecessors, (137726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132180 states to 132180 states and 137726 transitions. [2021-11-20 05:35:05,229 INFO L78 Accepts]: Start accepts. Automaton has 132180 states and 137726 transitions. Word has length 681 [2021-11-20 05:35:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:05,229 INFO L470 AbstractCegarLoop]: Abstraction has 132180 states and 137726 transitions. [2021-11-20 05:35:05,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 132180 states and 137726 transitions. [2021-11-20 05:35:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2021-11-20 05:35:05,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:05,253 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-20 05:35:05,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 05:35:05,253 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:35:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:05,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1786458142, now seen corresponding path program 1 times [2021-11-20 05:35:05,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:05,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919481124] [2021-11-20 05:35:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:05,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 686 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-11-20 05:35:05,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919481124] [2021-11-20 05:35:05,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919481124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:35:05,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:35:05,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:35:05,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704959540] [2021-11-20 05:35:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:35:05,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:35:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:35:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:05,555 INFO L87 Difference]: Start difference. First operand 132180 states and 137726 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:09,277 INFO L93 Difference]: Finished difference Result 265107 states and 276285 transitions. [2021-11-20 05:35:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:35:09,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 719 [2021-11-20 05:35:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:09,279 INFO L225 Difference]: With dead ends: 265107 [2021-11-20 05:35:09,279 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 05:35:09,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:35:09,341 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 684 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:09,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1117 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 05:35:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 05:35:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 05:35:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 05:35:09,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 719 [2021-11-20 05:35:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:09,344 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 05:35:09,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 05:35:09,345 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 05:35:09,347 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 05:35:09,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 05:35:09,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.