./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label31.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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/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 48e151e171192faba98bea76b0a05f258efede2f42bdf4a8243efed731650338 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:21:32,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:21:32,040 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:21:32,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:21:32,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:21:32,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:21:32,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:21:32,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:21:32,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:21:32,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:21:32,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:21:32,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:21:32,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:21:32,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:21:32,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:21:32,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:21:32,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:21:32,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:21:32,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:21:32,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:21:32,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:21:32,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:21:32,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:21:32,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:21:32,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:21:32,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:21:32,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:21:32,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:21:32,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:21:32,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:21:32,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:21:32,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:21:32,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:21:32,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:21:32,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:21:32,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:21:32,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:21:32,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:21:32,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:21:32,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:21:32,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:21:32,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:21:32,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:21:32,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:21:32,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:21:32,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:21:32,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:21:32,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:21:32,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:21:32,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:21:32,223 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:21:32,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:21:32,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:21:32,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:21:32,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:21:32,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:21:32,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:21:32,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:21:32,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:21:32,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:21:32,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:21:32,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:21:32,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:21:32,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:21:32,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:21:32,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:21:32,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:21:32,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:21:32,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:21:32,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:21:32,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:21:32,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:21:32,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:21:32,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:21:32,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:21:32,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:21:32,230 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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48e151e171192faba98bea76b0a05f258efede2f42bdf4a8243efed731650338 [2021-11-20 07:21:32,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:21:32,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:21:32,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:21:32,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:21:32,601 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:21:32,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2021-11-20 07:21:32,686 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/data/7022be17a/217dbcd7319a4db4bde51540c25a035c/FLAGa307f8993 [2021-11-20 07:21:33,611 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:21:33,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2021-11-20 07:21:33,650 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/data/7022be17a/217dbcd7319a4db4bde51540c25a035c/FLAGa307f8993 [2021-11-20 07:21:34,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/data/7022be17a/217dbcd7319a4db4bde51540c25a035c [2021-11-20 07:21:34,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:21:34,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:21:34,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:21:34,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:21:34,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:21:34,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:21:34" (1/1) ... [2021-11-20 07:21:34,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ab8250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:34, skipping insertion in model container [2021-11-20 07:21:34,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:21:34" (1/1) ... [2021-11-20 07:21:34,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:21:34,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:21:34,575 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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/sv-benchmarks/c/eca-rers2012/Problem18_label31.c[1896,1909] [2021-11-20 07:21:35,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:21:35,430 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:21:35,467 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_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/sv-benchmarks/c/eca-rers2012/Problem18_label31.c[1896,1909] [2021-11-20 07:21:36,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:21:36,174 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:21:36,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36 WrapperNode [2021-11-20 07:21:36,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:21:36,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:21:36,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:21:36,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:21:36,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,456 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-11-20 07:21:36,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:21:36,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:21:36,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:21:36,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:21:36,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:21:36,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:21:36,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:21:36,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:21:36,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (1/1) ... [2021-11-20 07:21:36,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:21:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:21:36,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:21:36,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:21:36,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:21:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:21:36,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:21:36,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:21:36,967 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:21:36,968 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:21:40,762 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:21:40,783 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:21:40,784 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:21:40,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:21:40 BoogieIcfgContainer [2021-11-20 07:21:40,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:21:40,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:21:40,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:21:40,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:21:40,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:21:34" (1/3) ... [2021-11-20 07:21:40,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175e42ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:21:40, skipping insertion in model container [2021-11-20 07:21:40,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:21:36" (2/3) ... [2021-11-20 07:21:40,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175e42ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:21:40, skipping insertion in model container [2021-11-20 07:21:40,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:21:40" (3/3) ... [2021-11-20 07:21:40,800 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label31.c [2021-11-20 07:21:40,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:21:40,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:21:40,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:21:40,875 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 07:21:40,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:21:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 07:21:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:21:40,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:40,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:40,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-11-20 07:21:40,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020227472] [2021-11-20 07:21:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:40,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:41,142 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 07:21:41,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:41,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020227472] [2021-11-20 07:21:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020227472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:41,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:41,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:21:41,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210896725] [2021-11-20 07:21:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:41,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:21:41,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:21:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:21:41,193 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:45,242 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-11-20 07:21:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:21:45,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 07:21:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:45,284 INFO L225 Difference]: With dead ends: 2205 [2021-11-20 07:21:45,286 INFO L226 Difference]: Without dead ends: 1384 [2021-11-20 07:21:45,297 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 07:21:45,302 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 733 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:45,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 291 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 07:21:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-20 07:21:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-20 07:21:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.7339117859725235) internal successors, (2398), 1383 states have internal predecessors, (2398), 0 states have call successors, (0), 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 07:21:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2398 transitions. [2021-11-20 07:21:45,448 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2398 transitions. Word has length 15 [2021-11-20 07:21:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:45,449 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2398 transitions. [2021-11-20 07:21:45,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2398 transitions. [2021-11-20 07:21:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:21:45,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:45,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:45,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:21:45,454 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -777028532, now seen corresponding path program 1 times [2021-11-20 07:21:45,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045250736] [2021-11-20 07:21:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:45,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:21:45,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:45,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045250736] [2021-11-20 07:21:45,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045250736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:45,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:45,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:21:45,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979992278] [2021-11-20 07:21:45,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:45,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:21:45,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:21:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:21:45,667 INFO L87 Difference]: Start difference. First operand 1384 states and 2398 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:21:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:50,734 INFO L93 Difference]: Finished difference Result 4842 states and 8275 transitions. [2021-11-20 07:21:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:21:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-20 07:21:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:50,758 INFO L225 Difference]: With dead ends: 4842 [2021-11-20 07:21:50,758 INFO L226 Difference]: Without dead ends: 3460 [2021-11-20 07:21:50,761 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 07:21:50,762 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 2033 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2033 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:50,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2033 Valid, 137 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 07:21:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-11-20 07:21:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3454. [2021-11-20 07:21:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.540689255719664) internal successors, (5320), 3453 states have internal predecessors, (5320), 0 states have call successors, (0), 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 07:21:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5320 transitions. [2021-11-20 07:21:50,857 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5320 transitions. Word has length 84 [2021-11-20 07:21:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:50,859 INFO L470 AbstractCegarLoop]: Abstraction has 3454 states and 5320 transitions. [2021-11-20 07:21:50,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 07:21:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5320 transitions. [2021-11-20 07:21:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 07:21:50,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:50,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:50,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:21:50,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:50,882 INFO L85 PathProgramCache]: Analyzing trace with hash -159976003, now seen corresponding path program 1 times [2021-11-20 07:21:50,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796059268] [2021-11-20 07:21:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:50,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:21:51,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:51,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796059268] [2021-11-20 07:21:51,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796059268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:51,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:21:51,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476792336] [2021-11-20 07:21:51,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:51,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:21:51,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:21:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:21:51,197 INFO L87 Difference]: Start difference. First operand 3454 states and 5320 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:55,734 INFO L93 Difference]: Finished difference Result 8976 states and 13752 transitions. [2021-11-20 07:21:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:21:55,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-11-20 07:21:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:55,769 INFO L225 Difference]: With dead ends: 8976 [2021-11-20 07:21:55,770 INFO L226 Difference]: Without dead ends: 5524 [2021-11-20 07:21:55,774 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 07:21:55,776 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1922 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4114 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 4114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:55,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1922 Valid, 647 Invalid, 4635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 4114 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 07:21:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-11-20 07:21:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5524. [2021-11-20 07:21:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.3489045808437443) internal successors, (7450), 5523 states have internal predecessors, (7450), 0 states have call successors, (0), 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 07:21:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7450 transitions. [2021-11-20 07:21:55,921 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7450 transitions. Word has length 193 [2021-11-20 07:21:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:55,921 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 7450 transitions. [2021-11-20 07:21:55,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7450 transitions. [2021-11-20 07:21:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-20 07:21:55,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:55,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:55,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:21:55,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1771818652, now seen corresponding path program 1 times [2021-11-20 07:21:55,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:55,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815490936] [2021-11-20 07:21:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:55,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:21:56,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:21:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815490936] [2021-11-20 07:21:56,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815490936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:21:56,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:21:56,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:21:56,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069703915] [2021-11-20 07:21:56,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:21:56,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:21:56,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:21:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:21:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:21:56,324 INFO L87 Difference]: Start difference. First operand 5524 states and 7450 transitions. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 07:21:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:59,477 INFO L93 Difference]: Finished difference Result 12479 states and 17177 transitions. [2021-11-20 07:21:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:21:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 282 [2021-11-20 07:21:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:59,510 INFO L225 Difference]: With dead ends: 12479 [2021-11-20 07:21:59,511 INFO L226 Difference]: Without dead ends: 7594 [2021-11-20 07:21:59,516 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 07:21:59,518 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 515 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:59,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 637 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 07:21:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-11-20 07:21:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 6904. [2021-11-20 07:21:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.2029552368535419) internal successors, (8304), 6903 states have internal predecessors, (8304), 0 states have call successors, (0), 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 07:21:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 8304 transitions. [2021-11-20 07:21:59,683 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 8304 transitions. Word has length 282 [2021-11-20 07:21:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:59,684 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 8304 transitions. [2021-11-20 07:21:59,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 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 07:21:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 8304 transitions. [2021-11-20 07:21:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2021-11-20 07:21:59,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:59,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:59,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:21:59,754 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:59,755 INFO L85 PathProgramCache]: Analyzing trace with hash 413398028, now seen corresponding path program 1 times [2021-11-20 07:21:59,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:21:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992726437] [2021-11-20 07:21:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:59,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:21:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-20 07:22:00,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:00,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992726437] [2021-11-20 07:22:00,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992726437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:00,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:00,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:22:00,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774049461] [2021-11-20 07:22:00,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:00,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:00,463 INFO L87 Difference]: Start difference. First operand 6904 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 07:22:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:02,987 INFO L93 Difference]: Finished difference Result 15186 states and 18598 transitions. [2021-11-20 07:22:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 914 [2021-11-20 07:22:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:03,043 INFO L225 Difference]: With dead ends: 15186 [2021-11-20 07:22:03,043 INFO L226 Difference]: Without dead ends: 8974 [2021-11-20 07:22:03,052 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 07:22:03,054 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 192 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:03,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 344 Invalid, 2194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1876 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 07:22:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-11-20 07:22:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8974. [2021-11-20 07:22:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8974 states, 8973 states have (on average 1.1776440432408337) internal successors, (10567), 8973 states have internal predecessors, (10567), 0 states have call successors, (0), 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 07:22:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8974 states to 8974 states and 10567 transitions. [2021-11-20 07:22:03,291 INFO L78 Accepts]: Start accepts. Automaton has 8974 states and 10567 transitions. Word has length 914 [2021-11-20 07:22:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 8974 states and 10567 transitions. [2021-11-20 07:22:03,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 07:22:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8974 states and 10567 transitions. [2021-11-20 07:22:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2021-11-20 07:22:03,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:03,338 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:03,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:22:03,338 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:03,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1254986839, now seen corresponding path program 1 times [2021-11-20 07:22:03,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:03,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492229511] [2021-11-20 07:22:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:03,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-11-20 07:22:04,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:04,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492229511] [2021-11-20 07:22:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492229511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:04,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:04,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:22:04,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45192697] [2021-11-20 07:22:04,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:04,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:04,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:04,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:04,063 INFO L87 Difference]: Start difference. First operand 8974 states and 10567 transitions. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 07:22:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:06,401 INFO L93 Difference]: Finished difference Result 21396 states and 26103 transitions. [2021-11-20 07:22:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 975 [2021-11-20 07:22:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:06,434 INFO L225 Difference]: With dead ends: 21396 [2021-11-20 07:22:06,435 INFO L226 Difference]: Without dead ends: 13114 [2021-11-20 07:22:06,448 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 07:22:06,449 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:06,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 389 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 07:22:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2021-11-20 07:22:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 12424. [2021-11-20 07:22:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.1489978266119294) internal successors, (14274), 12423 states have internal predecessors, (14274), 0 states have call successors, (0), 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 07:22:06,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 14274 transitions. [2021-11-20 07:22:06,802 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 14274 transitions. Word has length 975 [2021-11-20 07:22:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:06,804 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 14274 transitions. [2021-11-20 07:22:06,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 2 states have internal predecessors, (533), 0 states have call successors, (0), 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 07:22:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 14274 transitions. [2021-11-20 07:22:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2021-11-20 07:22:06,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:06,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:22:06,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:22:06,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash -559711196, now seen corresponding path program 1 times [2021-11-20 07:22:06,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:06,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185186116] [2021-11-20 07:22:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:06,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-11-20 07:22:07,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:07,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185186116] [2021-11-20 07:22:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185186116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:07,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:07,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:07,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340691402] [2021-11-20 07:22:07,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:07,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:07,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:07,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:07,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:07,404 INFO L87 Difference]: Start difference. First operand 12424 states and 14274 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 07:22:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:09,995 INFO L93 Difference]: Finished difference Result 28296 states and 33124 transitions. [2021-11-20 07:22:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 1000 [2021-11-20 07:22:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:10,033 INFO L225 Difference]: With dead ends: 28296 [2021-11-20 07:22:10,033 INFO L226 Difference]: Without dead ends: 16564 [2021-11-20 07:22:10,047 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 07:22:10,048 INFO L933 BasicCegarLoop]: 1115 mSDtfsCounter, 679 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:10,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1122 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 07:22:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2021-11-20 07:22:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 15874. [2021-11-20 07:22:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15874 states, 15873 states have (on average 1.1463491463491464) internal successors, (18196), 15873 states have internal predecessors, (18196), 0 states have call successors, (0), 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 07:22:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 18196 transitions. [2021-11-20 07:22:10,318 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 18196 transitions. Word has length 1000 [2021-11-20 07:22:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 15874 states and 18196 transitions. [2021-11-20 07:22:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 07:22:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 18196 transitions. [2021-11-20 07:22:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-11-20 07:22:10,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:10,338 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:22:10,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:22:10,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 42672131, now seen corresponding path program 1 times [2021-11-20 07:22:10,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:10,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368662324] [2021-11-20 07:22:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:10,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-20 07:22:10,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:10,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368662324] [2021-11-20 07:22:10,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368662324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:10,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:10,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:10,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936867787] [2021-11-20 07:22:10,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:10,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:10,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:10,870 INFO L87 Difference]: Start difference. First operand 15874 states and 18196 transitions. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 07:22:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:13,191 INFO L93 Difference]: Finished difference Result 37266 states and 43091 transitions. [2021-11-20 07:22:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:13,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 1037 [2021-11-20 07:22:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:13,235 INFO L225 Difference]: With dead ends: 37266 [2021-11-20 07:22:13,235 INFO L226 Difference]: Without dead ends: 22084 [2021-11-20 07:22:13,254 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 07:22:13,255 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 577 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:13,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 1011 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 07:22:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2021-11-20 07:22:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22084. [2021-11-20 07:22:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22084 states, 22083 states have (on average 1.127609473350541) internal successors, (24901), 22083 states have internal predecessors, (24901), 0 states have call successors, (0), 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 07:22:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22084 states to 22084 states and 24901 transitions. [2021-11-20 07:22:13,687 INFO L78 Accepts]: Start accepts. Automaton has 22084 states and 24901 transitions. Word has length 1037 [2021-11-20 07:22:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 22084 states and 24901 transitions. [2021-11-20 07:22:13,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 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 07:22:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 22084 states and 24901 transitions. [2021-11-20 07:22:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2021-11-20 07:22:13,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:13,715 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:22:13,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:22:13,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 360538417, now seen corresponding path program 1 times [2021-11-20 07:22:13,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:13,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437595215] [2021-11-20 07:22:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:13,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-11-20 07:22:14,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:14,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437595215] [2021-11-20 07:22:14,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437595215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:14,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:14,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:14,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910125605] [2021-11-20 07:22:14,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:14,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:14,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:14,245 INFO L87 Difference]: Start difference. First operand 22084 states and 24901 transitions. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 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 07:22:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:16,899 INFO L93 Difference]: Finished difference Result 53136 states and 60864 transitions. [2021-11-20 07:22:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 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 1088 [2021-11-20 07:22:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:16,960 INFO L225 Difference]: With dead ends: 53136 [2021-11-20 07:22:16,960 INFO L226 Difference]: Without dead ends: 32434 [2021-11-20 07:22:16,979 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 07:22:16,980 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 667 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:16,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1067 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 07:22:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32434 states. [2021-11-20 07:22:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32434 to 30364. [2021-11-20 07:22:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30364 states, 30363 states have (on average 1.121694167243026) internal successors, (34058), 30363 states have internal predecessors, (34058), 0 states have call successors, (0), 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 07:22:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30364 states to 30364 states and 34058 transitions. [2021-11-20 07:22:17,629 INFO L78 Accepts]: Start accepts. Automaton has 30364 states and 34058 transitions. Word has length 1088 [2021-11-20 07:22:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:17,630 INFO L470 AbstractCegarLoop]: Abstraction has 30364 states and 34058 transitions. [2021-11-20 07:22:17,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 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 07:22:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30364 states and 34058 transitions. [2021-11-20 07:22:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1105 [2021-11-20 07:22:17,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:17,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:17,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:22:17,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2004798770, now seen corresponding path program 1 times [2021-11-20 07:22:17,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:17,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970168706] [2021-11-20 07:22:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:17,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 771 proven. 280 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 07:22:18,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:18,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970168706] [2021-11-20 07:22:18,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970168706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100134149] [2021-11-20 07:22:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:18,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:18,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:18,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:22:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:18,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:22:18,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-20 07:22:20,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:22:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100134149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:20,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:22:20,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:22:20,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813795485] [2021-11-20 07:22:20,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:20,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:20,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:20,887 INFO L87 Difference]: Start difference. First operand 30364 states and 34058 transitions. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 07:22:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:23,171 INFO L93 Difference]: Finished difference Result 68316 states and 76930 transitions. [2021-11-20 07:22:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 1104 [2021-11-20 07:22:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:23,221 INFO L225 Difference]: With dead ends: 68316 [2021-11-20 07:22:23,221 INFO L226 Difference]: Without dead ends: 33814 [2021-11-20 07:22:23,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:23,242 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 649 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:23,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 973 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 07:22:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2021-11-20 07:22:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 31054. [2021-11-20 07:22:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31054 states, 31053 states have (on average 1.0550993462789424) internal successors, (32764), 31053 states have internal predecessors, (32764), 0 states have call successors, (0), 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 07:22:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31054 states to 31054 states and 32764 transitions. [2021-11-20 07:22:23,926 INFO L78 Accepts]: Start accepts. Automaton has 31054 states and 32764 transitions. Word has length 1104 [2021-11-20 07:22:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:23,928 INFO L470 AbstractCegarLoop]: Abstraction has 31054 states and 32764 transitions. [2021-11-20 07:22:23,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 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 07:22:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31054 states and 32764 transitions. [2021-11-20 07:22:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1126 [2021-11-20 07:22:23,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:23,954 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:22:23,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:24,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:22:24,169 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash 493038576, now seen corresponding path program 1 times [2021-11-20 07:22:24,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103695622] [2021-11-20 07:22:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:24,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-11-20 07:22:24,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103695622] [2021-11-20 07:22:24,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103695622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:24,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:24,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:24,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781552193] [2021-11-20 07:22:24,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:24,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:24,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:24,870 INFO L87 Difference]: Start difference. First operand 31054 states and 32764 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 07:22:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:27,019 INFO L93 Difference]: Finished difference Result 73146 states and 77880 transitions. [2021-11-20 07:22:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 1125 [2021-11-20 07:22:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:27,073 INFO L225 Difference]: With dead ends: 73146 [2021-11-20 07:22:27,074 INFO L226 Difference]: Without dead ends: 42784 [2021-11-20 07:22:27,095 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 07:22:27,096 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:27,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 983 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:22:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42784 states. [2021-11-20 07:22:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42784 to 41404. [2021-11-20 07:22:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0530396348090718) internal successors, (43599), 41403 states have internal predecessors, (43599), 0 states have call successors, (0), 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 07:22:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 43599 transitions. [2021-11-20 07:22:27,772 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 43599 transitions. Word has length 1125 [2021-11-20 07:22:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:27,773 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 43599 transitions. [2021-11-20 07:22:27,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 07:22:27,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 43599 transitions. [2021-11-20 07:22:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1163 [2021-11-20 07:22:27,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:27,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:27,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:22:27,793 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1093889951, now seen corresponding path program 1 times [2021-11-20 07:22:27,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:27,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584895631] [2021-11-20 07:22:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:27,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 781 proven. 330 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:22:28,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:28,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584895631] [2021-11-20 07:22:28,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584895631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076725367] [2021-11-20 07:22:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:28,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:28,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:28,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:22:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:22:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 584 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2021-11-20 07:22:31,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:22:31,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076725367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:31,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:22:31,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:22:31,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259692822] [2021-11-20 07:22:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:31,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:31,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:31,030 INFO L87 Difference]: Start difference. First operand 41404 states and 43599 transitions. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 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 07:22:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:32,786 INFO L93 Difference]: Finished difference Result 82116 states and 86505 transitions. [2021-11-20 07:22:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 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 1162 [2021-11-20 07:22:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:32,844 INFO L225 Difference]: With dead ends: 82116 [2021-11-20 07:22:32,844 INFO L226 Difference]: Without dead ends: 41404 [2021-11-20 07:22:32,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:32,864 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 541 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:32,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 115 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:22:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-11-20 07:22:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2021-11-20 07:22:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0395140448759752) internal successors, (43039), 41403 states have internal predecessors, (43039), 0 states have call successors, (0), 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 07:22:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 43039 transitions. [2021-11-20 07:22:33,631 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 43039 transitions. Word has length 1162 [2021-11-20 07:22:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:33,632 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 43039 transitions. [2021-11-20 07:22:33,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 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 07:22:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 43039 transitions. [2021-11-20 07:22:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1260 [2021-11-20 07:22:33,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:33,683 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:33,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:33,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:33,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1410235329, now seen corresponding path program 1 times [2021-11-20 07:22:33,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287914434] [2021-11-20 07:22:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:33,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2021-11-20 07:22:34,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:34,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287914434] [2021-11-20 07:22:34,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287914434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:34,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:34,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:34,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102567805] [2021-11-20 07:22:34,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:34,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:34,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:34,740 INFO L87 Difference]: Start difference. First operand 41404 states and 43039 transitions. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 07:22:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:36,599 INFO L93 Difference]: Finished difference Result 82116 states and 85385 transitions. [2021-11-20 07:22:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:36,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 1259 [2021-11-20 07:22:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:36,634 INFO L225 Difference]: With dead ends: 82116 [2021-11-20 07:22:36,634 INFO L226 Difference]: Without dead ends: 41404 [2021-11-20 07:22:36,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 07:22:36,651 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 782 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:36,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 746 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:22:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-11-20 07:22:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 41404. [2021-11-20 07:22:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41404 states, 41403 states have (on average 1.0355529792527112) internal successors, (42875), 41403 states have internal predecessors, (42875), 0 states have call successors, (0), 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 07:22:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41404 states to 41404 states and 42875 transitions. [2021-11-20 07:22:37,115 INFO L78 Accepts]: Start accepts. Automaton has 41404 states and 42875 transitions. Word has length 1259 [2021-11-20 07:22:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:37,116 INFO L470 AbstractCegarLoop]: Abstraction has 41404 states and 42875 transitions. [2021-11-20 07:22:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 07:22:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 41404 states and 42875 transitions. [2021-11-20 07:22:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1279 [2021-11-20 07:22:37,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:37,138 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:37,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:22:37,138 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1336216221, now seen corresponding path program 1 times [2021-11-20 07:22:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:37,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225656229] [2021-11-20 07:22:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 1050 proven. 0 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2021-11-20 07:22:37,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225656229] [2021-11-20 07:22:37,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225656229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:37,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:37,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:37,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214347508] [2021-11-20 07:22:37,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:37,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:37,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:37,920 INFO L87 Difference]: Start difference. First operand 41404 states and 42875 transitions. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 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 07:22:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:39,858 INFO L93 Difference]: Finished difference Result 81426 states and 84344 transitions. [2021-11-20 07:22:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 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 1278 [2021-11-20 07:22:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:39,902 INFO L225 Difference]: With dead ends: 81426 [2021-11-20 07:22:39,902 INFO L226 Difference]: Without dead ends: 40714 [2021-11-20 07:22:39,922 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 07:22:39,923 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 504 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:39,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 932 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:22:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40714 states. [2021-11-20 07:22:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40714 to 40024. [2021-11-20 07:22:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.0305574294780502) internal successors, (41246), 40023 states have internal predecessors, (41246), 0 states have call successors, (0), 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 07:22:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 41246 transitions. [2021-11-20 07:22:40,452 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 41246 transitions. Word has length 1278 [2021-11-20 07:22:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 40024 states and 41246 transitions. [2021-11-20 07:22:40,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 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 07:22:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 41246 transitions. [2021-11-20 07:22:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1361 [2021-11-20 07:22:40,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:40,479 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:22:40,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1120133273, now seen corresponding path program 1 times [2021-11-20 07:22:40,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:40,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849641114] [2021-11-20 07:22:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:40,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 1387 proven. 0 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2021-11-20 07:22:41,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849641114] [2021-11-20 07:22:41,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849641114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:41,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:41,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:22:41,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560164911] [2021-11-20 07:22:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:41,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:41,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:22:41,064 INFO L87 Difference]: Start difference. First operand 40024 states and 41246 transitions. Second operand has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:22:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:43,146 INFO L93 Difference]: Finished difference Result 86256 states and 88980 transitions. [2021-11-20 07:22:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 1360 [2021-11-20 07:22:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:43,189 INFO L225 Difference]: With dead ends: 86256 [2021-11-20 07:22:43,189 INFO L226 Difference]: Without dead ends: 46924 [2021-11-20 07:22:43,202 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 07:22:43,203 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 585 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:43,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 279 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:22:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-20 07:22:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 46234. [2021-11-20 07:22:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.0297190318603595) internal successors, (47607), 46233 states have internal predecessors, (47607), 0 states have call successors, (0), 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 07:22:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 47607 transitions. [2021-11-20 07:22:43,888 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 47607 transitions. Word has length 1360 [2021-11-20 07:22:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:43,889 INFO L470 AbstractCegarLoop]: Abstraction has 46234 states and 47607 transitions. [2021-11-20 07:22:43,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 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 07:22:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 47607 transitions. [2021-11-20 07:22:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1432 [2021-11-20 07:22:43,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:43,939 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:22:43,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:22:43,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1752219443, now seen corresponding path program 1 times [2021-11-20 07:22:43,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537552247] [2021-11-20 07:22:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 1525 proven. 330 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-20 07:22:44,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:44,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537552247] [2021-11-20 07:22:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537552247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610278213] [2021-11-20 07:22:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:44,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:44,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:44,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:22:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:22:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2021-11-20 07:22:47,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:22:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610278213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:47,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:22:47,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:22:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558842821] [2021-11-20 07:22:47,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:47,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:47,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:47,302 INFO L87 Difference]: Start difference. First operand 46234 states and 47607 transitions. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 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 07:22:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:49,163 INFO L93 Difference]: Finished difference Result 92466 states and 95219 transitions. [2021-11-20 07:22:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 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 1431 [2021-11-20 07:22:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:49,211 INFO L225 Difference]: With dead ends: 92466 [2021-11-20 07:22:49,211 INFO L226 Difference]: Without dead ends: 46924 [2021-11-20 07:22:49,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1437 GetRequests, 1430 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:49,372 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 620 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:49,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 61 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:22:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-20 07:22:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 46234. [2021-11-20 07:22:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.029113403845738) internal successors, (47579), 46233 states have internal predecessors, (47579), 0 states have call successors, (0), 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 07:22:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 47579 transitions. [2021-11-20 07:22:49,796 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 47579 transitions. Word has length 1431 [2021-11-20 07:22:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:49,797 INFO L470 AbstractCegarLoop]: Abstraction has 46234 states and 47579 transitions. [2021-11-20 07:22:49,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 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 07:22:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 47579 transitions. [2021-11-20 07:22:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1469 [2021-11-20 07:22:49,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:49,821 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:49,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:22:50,022 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:50,022 INFO L85 PathProgramCache]: Analyzing trace with hash -239592481, now seen corresponding path program 1 times [2021-11-20 07:22:50,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086454670] [2021-11-20 07:22:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:50,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 1364 proven. 330 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 07:22:50,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086454670] [2021-11-20 07:22:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086454670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2313349] [2021-11-20 07:22:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:50,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:50,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:50,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:22:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:22:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2021-11-20 07:22:53,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:22:53,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2313349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:53,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:22:53,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:22:53,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459015705] [2021-11-20 07:22:53,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:53,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:22:53,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:22:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:53,470 INFO L87 Difference]: Start difference. First operand 46234 states and 47579 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 07:22:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:55,537 INFO L93 Difference]: Finished difference Result 93156 states and 95862 transitions. [2021-11-20 07:22:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:22:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 1468 [2021-11-20 07:22:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:55,590 INFO L225 Difference]: With dead ends: 93156 [2021-11-20 07:22:55,590 INFO L226 Difference]: Without dead ends: 46924 [2021-11-20 07:22:55,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1467 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:22:55,614 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 689 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:55,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 903 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:22:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46924 states. [2021-11-20 07:22:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46924 to 45544. [2021-11-20 07:22:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45544 states, 45543 states have (on average 1.0256460927035989) internal successors, (46711), 45543 states have internal predecessors, (46711), 0 states have call successors, (0), 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 07:22:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45544 states to 45544 states and 46711 transitions. [2021-11-20 07:22:56,190 INFO L78 Accepts]: Start accepts. Automaton has 45544 states and 46711 transitions. Word has length 1468 [2021-11-20 07:22:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:56,191 INFO L470 AbstractCegarLoop]: Abstraction has 45544 states and 46711 transitions. [2021-11-20 07:22:56,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 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 07:22:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45544 states and 46711 transitions. [2021-11-20 07:22:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2021-11-20 07:22:56,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:56,227 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:56,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:22:56,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:22:56,441 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash -43978579, now seen corresponding path program 1 times [2021-11-20 07:22:56,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934105185] [2021-11-20 07:22:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:56,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1075 proven. 246 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-11-20 07:22:57,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934105185] [2021-11-20 07:22:57,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934105185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:22:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766385530] [2021-11-20 07:22:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:57,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:22:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:57,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:22:57,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:22:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:22:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2525 backedges. 1116 proven. 0 refuted. 0 times theorem prover too weak. 1409 trivial. 0 not checked. [2021-11-20 07:23:00,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:23:00,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766385530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:00,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:23:00,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-20 07:23:00,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443279682] [2021-11-20 07:23:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:00,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:00,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:00,209 INFO L87 Difference]: Start difference. First operand 45544 states and 46711 transitions. Second operand has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 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 07:23:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:02,314 INFO L93 Difference]: Finished difference Result 95226 states and 97834 transitions. [2021-11-20 07:23:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 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 1557 [2021-11-20 07:23:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:02,360 INFO L225 Difference]: With dead ends: 95226 [2021-11-20 07:23:02,360 INFO L226 Difference]: Without dead ends: 48304 [2021-11-20 07:23:02,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1560 GetRequests, 1557 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 07:23:02,379 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 341 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:02,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 850 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 07:23:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48304 states. [2021-11-20 07:23:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48304 to 48304. [2021-11-20 07:23:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48304 states, 48303 states have (on average 1.0249466906817382) internal successors, (49508), 48303 states have internal predecessors, (49508), 0 states have call successors, (0), 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 07:23:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48304 states to 48304 states and 49508 transitions. [2021-11-20 07:23:03,165 INFO L78 Accepts]: Start accepts. Automaton has 48304 states and 49508 transitions. Word has length 1557 [2021-11-20 07:23:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:03,166 INFO L470 AbstractCegarLoop]: Abstraction has 48304 states and 49508 transitions. [2021-11-20 07:23:03,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 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 07:23:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 48304 states and 49508 transitions. [2021-11-20 07:23:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1621 [2021-11-20 07:23:03,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:03,218 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:03,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:03,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:23:03,445 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash -2108889490, now seen corresponding path program 1 times [2021-11-20 07:23:03,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:03,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395583842] [2021-11-20 07:23:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:03,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1838 proven. 330 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-20 07:23:04,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:04,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395583842] [2021-11-20 07:23:04,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395583842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447091105] [2021-11-20 07:23:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:04,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:04,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:04,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:04,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:23:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:23:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 2513 trivial. 0 not checked. [2021-11-20 07:23:07,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:23:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447091105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:07,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:23:07,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-20 07:23:07,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905974684] [2021-11-20 07:23:07,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:07,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:07,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:23:07,298 INFO L87 Difference]: Start difference. First operand 48304 states and 49508 transitions. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 07:23:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:09,725 INFO L93 Difference]: Finished difference Result 113856 states and 116718 transitions. [2021-11-20 07:23:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 1620 [2021-11-20 07:23:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:09,797 INFO L225 Difference]: With dead ends: 113856 [2021-11-20 07:23:09,797 INFO L226 Difference]: Without dead ends: 65554 [2021-11-20 07:23:09,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1626 GetRequests, 1619 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:23:09,819 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 686 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:09,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 981 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 07:23:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65554 states. [2021-11-20 07:23:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65554 to 65554. [2021-11-20 07:23:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65554 states, 65553 states have (on average 1.021158451939652) internal successors, (66940), 65553 states have internal predecessors, (66940), 0 states have call successors, (0), 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 07:23:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65554 states to 65554 states and 66940 transitions. [2021-11-20 07:23:10,972 INFO L78 Accepts]: Start accepts. Automaton has 65554 states and 66940 transitions. Word has length 1620 [2021-11-20 07:23:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,974 INFO L470 AbstractCegarLoop]: Abstraction has 65554 states and 66940 transitions. [2021-11-20 07:23:10,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 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 07:23:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 65554 states and 66940 transitions. [2021-11-20 07:23:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1701 [2021-11-20 07:23:11,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:11,048 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:23:11,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:11,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:11,265 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:11,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2037155259, now seen corresponding path program 1 times [2021-11-20 07:23:11,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:11,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222978381] [2021-11-20 07:23:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:11,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1867 proven. 0 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2021-11-20 07:23:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222978381] [2021-11-20 07:23:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222978381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:11,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643953382] [2021-11-20 07:23:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:11,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:11,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:11,802 INFO L87 Difference]: Start difference. First operand 65554 states and 66940 transitions. Second operand has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:23:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:14,141 INFO L93 Difference]: Finished difference Result 156636 states and 160176 transitions. [2021-11-20 07:23:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 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 1700 [2021-11-20 07:23:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:14,225 INFO L225 Difference]: With dead ends: 156636 [2021-11-20 07:23:14,225 INFO L226 Difference]: Without dead ends: 91774 [2021-11-20 07:23:14,253 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 07:23:14,254 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 611 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:14,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 255 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:23:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91774 states. [2021-11-20 07:23:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91774 to 89014. [2021-11-20 07:23:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89014 states, 89013 states have (on average 1.0204239830137172) internal successors, (90831), 89013 states have internal predecessors, (90831), 0 states have call successors, (0), 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 07:23:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89014 states to 89014 states and 90831 transitions. [2021-11-20 07:23:15,383 INFO L78 Accepts]: Start accepts. Automaton has 89014 states and 90831 transitions. Word has length 1700 [2021-11-20 07:23:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:15,384 INFO L470 AbstractCegarLoop]: Abstraction has 89014 states and 90831 transitions. [2021-11-20 07:23:15,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 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 07:23:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 89014 states and 90831 transitions. [2021-11-20 07:23:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1861 [2021-11-20 07:23:15,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:15,875 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:23:15,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:23:15,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2136829389, now seen corresponding path program 1 times [2021-11-20 07:23:15,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:15,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377315324] [2021-11-20 07:23:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:15,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3470 backedges. 2591 proven. 291 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-11-20 07:23:16,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377315324] [2021-11-20 07:23:16,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377315324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:16,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891173567] [2021-11-20 07:23:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:16,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:16,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:16,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:16,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:23:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:23:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3470 backedges. 2257 proven. 318 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-20 07:23:31,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3470 backedges. 2257 proven. 318 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-20 07:23:37,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891173567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:23:37,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:23:37,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-20 07:23:37,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208770735] [2021-11-20 07:23:37,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:23:37,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:23:37,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:23:37,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:23:37,972 INFO L87 Difference]: Start difference. First operand 89014 states and 90831 transitions. Second operand has 11 states, 11 states have (on average 271.27272727272725) internal successors, (2984), 11 states have internal predecessors, (2984), 0 states have call successors, (0), 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 07:23:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:58,251 INFO L93 Difference]: Finished difference Result 251856 states and 257441 transitions. [2021-11-20 07:23:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:23:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 271.27272727272725) internal successors, (2984), 11 states have internal predecessors, (2984), 0 states have call successors, (0), 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 1860 [2021-11-20 07:23:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:58,418 INFO L225 Difference]: With dead ends: 251856 [2021-11-20 07:23:58,418 INFO L226 Difference]: Without dead ends: 163534 [2021-11-20 07:23:58,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3769 GetRequests, 3737 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:23:58,445 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 21742 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24469 mSolverCounterSat, 3777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21742 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 28246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3777 IncrementalHoareTripleChecker+Valid, 24469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21742 Valid, 169 Invalid, 28246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3777 Valid, 24469 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2021-11-20 07:23:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163534 states. [2021-11-20 07:24:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163534 to 138004. [2021-11-20 07:24:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138004 states, 138003 states have (on average 1.0165793497242814) internal successors, (140291), 138003 states have internal predecessors, (140291), 0 states have call successors, (0), 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 07:24:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138004 states to 138004 states and 140291 transitions. [2021-11-20 07:24:00,837 INFO L78 Accepts]: Start accepts. Automaton has 138004 states and 140291 transitions. Word has length 1860 [2021-11-20 07:24:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:00,838 INFO L470 AbstractCegarLoop]: Abstraction has 138004 states and 140291 transitions. [2021-11-20 07:24:00,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 271.27272727272725) internal successors, (2984), 11 states have internal predecessors, (2984), 0 states have call successors, (0), 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 07:24:00,839 INFO L276 IsEmpty]: Start isEmpty. Operand 138004 states and 140291 transitions. [2021-11-20 07:24:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2073 [2021-11-20 07:24:00,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:00,932 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 07:24:00,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:01,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:24:01,157 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:01,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1709736793, now seen corresponding path program 1 times [2021-11-20 07:24:01,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:01,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535931423] [2021-11-20 07:24:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:01,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 3069 proven. 0 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-20 07:24:01,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535931423] [2021-11-20 07:24:01,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535931423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:01,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:01,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:24:01,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837439890] [2021-11-20 07:24:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:01,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:24:01,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:24:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:01,938 INFO L87 Difference]: Start difference. First operand 138004 states and 140291 transitions. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 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 07:24:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:04,650 INFO L93 Difference]: Finished difference Result 291876 states and 296742 transitions. [2021-11-20 07:24:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:24:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 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 2072 [2021-11-20 07:24:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:04,815 INFO L225 Difference]: With dead ends: 291876 [2021-11-20 07:24:04,815 INFO L226 Difference]: Without dead ends: 154564 [2021-11-20 07:24:04,874 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 07:24:04,875 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 523 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:04,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 918 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 07:24:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154564 states. [2021-11-20 07:24:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154564 to 153184. [2021-11-20 07:24:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153184 states, 153183 states have (on average 1.0156805911883173) internal successors, (155585), 153183 states have internal predecessors, (155585), 0 states have call successors, (0), 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 07:24:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153184 states to 153184 states and 155585 transitions. [2021-11-20 07:24:07,702 INFO L78 Accepts]: Start accepts. Automaton has 153184 states and 155585 transitions. Word has length 2072 [2021-11-20 07:24:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:07,703 INFO L470 AbstractCegarLoop]: Abstraction has 153184 states and 155585 transitions. [2021-11-20 07:24:07,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 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 07:24:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 153184 states and 155585 transitions. [2021-11-20 07:24:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2288 [2021-11-20 07:24:07,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:07,806 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:07,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 07:24:07,806 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash 283960276, now seen corresponding path program 1 times [2021-11-20 07:24:07,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400078724] [2021-11-20 07:24:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:07,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 2456 proven. 0 refuted. 0 times theorem prover too weak. 2763 trivial. 0 not checked. [2021-11-20 07:24:09,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400078724] [2021-11-20 07:24:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400078724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:09,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:24:09,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:24:09,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381827846] [2021-11-20 07:24:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:09,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:24:09,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:09,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:24:09,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:24:09,406 INFO L87 Difference]: Start difference. First operand 153184 states and 155585 transitions. Second operand has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 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 07:24:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:11,993 INFO L93 Difference]: Finished difference Result 303606 states and 308348 transitions. [2021-11-20 07:24:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:24:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 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 2287 [2021-11-20 07:24:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:12,156 INFO L225 Difference]: With dead ends: 303606 [2021-11-20 07:24:12,156 INFO L226 Difference]: Without dead ends: 151114 [2021-11-20 07:24:12,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 07:24:12,206 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 630 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:12,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 78 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:24:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151114 states. [2021-11-20 07:24:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151114 to 145594. [2021-11-20 07:24:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145594 states, 145593 states have (on average 1.0125349433008455) internal successors, (147418), 145593 states have internal predecessors, (147418), 0 states have call successors, (0), 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 07:24:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145594 states to 145594 states and 147418 transitions. [2021-11-20 07:24:14,474 INFO L78 Accepts]: Start accepts. Automaton has 145594 states and 147418 transitions. Word has length 2287 [2021-11-20 07:24:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:14,475 INFO L470 AbstractCegarLoop]: Abstraction has 145594 states and 147418 transitions. [2021-11-20 07:24:14,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 366.6666666666667) internal successors, (1100), 3 states have internal predecessors, (1100), 0 states have call successors, (0), 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 07:24:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 145594 states and 147418 transitions. [2021-11-20 07:24:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2339 [2021-11-20 07:24:15,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:15,084 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:15,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 07:24:15,085 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 723965443, now seen corresponding path program 1 times [2021-11-20 07:24:15,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:15,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114124288] [2021-11-20 07:24:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:15,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5751 backedges. 3759 proven. 1226 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-11-20 07:24:16,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:16,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114124288] [2021-11-20 07:24:16,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114124288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:16,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201792132] [2021-11-20 07:24:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:16,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:16,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:16,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:16,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40c98df-cd1a-4c9c-bf7a-b1a128ee81c6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:24:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:17,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:24:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5751 backedges. 3915 proven. 0 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2021-11-20 07:24:20,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:24:20,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201792132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:24:20,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:24:20,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-20 07:24:20,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911221689] [2021-11-20 07:24:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:24:20,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:24:20,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:24:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:24:20,649 INFO L87 Difference]: Start difference. First operand 145594 states and 147418 transitions. Second operand has 3 states, 3 states have (on average 394.6666666666667) internal successors, (1184), 3 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)