./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.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_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/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_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/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_45c93ad8-2690-4aa2-98d7-68621b75e225/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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:00:40,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:00:40,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:00:40,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:00:40,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:00:40,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:00:40,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:00:40,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:00:40,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:00:40,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:00:40,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:00:40,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:00:40,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:00:40,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:00:40,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:00:40,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:00:40,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:00:40,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:00:40,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:00:40,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:00:40,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:00:40,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:00:40,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:00:40,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:00:40,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:00:40,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:00:40,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:00:40,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:00:40,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:00:40,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:00:40,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:00:40,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:00:40,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:00:40,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:00:40,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:00:40,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:00:40,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:00:40,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:00:40,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:00:40,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:00:40,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:00:40,183 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:00:40,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:00:40,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:00:40,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:00:40,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:00:40,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:00:40,236 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:00:40,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:00:40,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:00:40,237 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:00:40,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:00:40,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:00:40,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:00:40,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:00:40,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:00:40,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:00:40,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:00:40,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:00:40,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:00:40,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:00:40,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:00:40,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:00:40,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:00:40,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:00:40,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:00:40,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:00:40,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:00:40,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:00:40,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:00:40,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:00:40,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:00:40,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:00:40,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:00:40,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:00:40,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:00:40,246 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_45c93ad8-2690-4aa2-98d7-68621b75e225/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-20 06:00:40,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:00:40,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:00:40,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:00:40,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:00:40,547 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:00:40,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-20 06:00:40,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/data/414a7cf06/071549d0d89a4bfdbb29664cf42fb024/FLAGc562ffe80 [2021-11-20 06:00:41,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:00:41,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-20 06:00:41,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/data/414a7cf06/071549d0d89a4bfdbb29664cf42fb024/FLAGc562ffe80 [2021-11-20 06:00:41,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/data/414a7cf06/071549d0d89a4bfdbb29664cf42fb024 [2021-11-20 06:00:41,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:00:41,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:00:41,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:00:41,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:00:41,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:00:41,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:00:41" (1/1) ... [2021-11-20 06:00:41,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350cc121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:41, skipping insertion in model container [2021-11-20 06:00:41,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:00:41" (1/1) ... [2021-11-20 06:00:41,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:00:41,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:00:41,908 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_45c93ad8-2690-4aa2-98d7-68621b75e225/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-20 06:00:42,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:00:42,226 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:00:42,258 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_45c93ad8-2690-4aa2-98d7-68621b75e225/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-20 06:00:42,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:00:42,392 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:00:42,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42 WrapperNode [2021-11-20 06:00:42,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:00:42,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:00:42,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:00:42,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:00:42,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,562 INFO L137 Inliner]: procedures = 93, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 894 [2021-11-20 06:00:42,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:00:42,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:00:42,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:00:42,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:00:42,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:00:42,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:00:42,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:00:42,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:00:42,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (1/1) ... [2021-11-20 06:00:42,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:00:42,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:42,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:00:42,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:00:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 06:00:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 06:00:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:00:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 06:00:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 06:00:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 06:00:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 06:00:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 06:00:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 06:00:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 06:00:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 06:00:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 06:00:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 06:00:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 06:00:42,778 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 06:00:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 06:00:42,779 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 06:00:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 06:00:42,779 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 06:00:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 06:00:42,779 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 06:00:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 06:00:42,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 06:00:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 06:00:42,780 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 06:00:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 06:00:42,780 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 06:00:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 06:00:42,780 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 06:00:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 06:00:42,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 06:00:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 06:00:42,781 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 06:00:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 06:00:42,781 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 06:00:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 06:00:42,782 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 06:00:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 06:00:42,782 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 06:00:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 06:00:42,782 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 06:00:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:00:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-20 06:00:42,783 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-20 06:00:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 06:00:42,783 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 06:00:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 06:00:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 06:00:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 06:00:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 06:00:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:00:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:00:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 06:00:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 06:00:42,952 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:00:42,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:00:44,165 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:00:44,189 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:00:44,190 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:00:44,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:00:44 BoogieIcfgContainer [2021-11-20 06:00:44,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:00:44,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:00:44,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:00:44,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:00:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:00:41" (1/3) ... [2021-11-20 06:00:44,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cc071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:00:44, skipping insertion in model container [2021-11-20 06:00:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:00:42" (2/3) ... [2021-11-20 06:00:44,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cc071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:00:44, skipping insertion in model container [2021-11-20 06:00:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:00:44" (3/3) ... [2021-11-20 06:00:44,204 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-20 06:00:44,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:00:44,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:00:44,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:00:44,275 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 06:00:44,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:00:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-20 06:00:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:00:44,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:44,352 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:44,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1983373863, now seen corresponding path program 1 times [2021-11-20 06:00:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702079403] [2021-11-20 06:00:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:44,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:00:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:00:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:00:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:45,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702079403] [2021-11-20 06:00:45,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702079403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354709221] [2021-11-20 06:00:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:45,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:45,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:45,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:00:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:00:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:00:46,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:46,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354709221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:46,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:46,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-11-20 06:00:46,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696666747] [2021-11-20 06:00:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:00:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:00:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:00:46,386 INFO L87 Difference]: Start difference. First operand has 579 states, 454 states have (on average 1.6916299559471366) internal successors, (768), 475 states have internal predecessors, (768), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 06:00:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:46,500 INFO L93 Difference]: Finished difference Result 600 states and 994 transitions. [2021-11-20 06:00:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:00:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 111 [2021-11-20 06:00:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:46,530 INFO L225 Difference]: With dead ends: 600 [2021-11-20 06:00:46,532 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 06:00:46,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:00:46,542 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 06:00:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-20 06:00:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6897321428571428) internal successors, (757), 467 states have internal predecessors, (757), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 948 transitions. [2021-11-20 06:00:46,728 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 948 transitions. Word has length 111 [2021-11-20 06:00:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:46,730 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 948 transitions. [2021-11-20 06:00:46,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 06:00:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 948 transitions. [2021-11-20 06:00:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 06:00:46,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:46,743 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:46,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:46,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:46,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2050586346, now seen corresponding path program 1 times [2021-11-20 06:00:46,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:46,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834182889] [2021-11-20 06:00:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:46,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:00:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:00:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:00:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:47,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:47,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834182889] [2021-11-20 06:00:47,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834182889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:47,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270642550] [2021-11-20 06:00:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:47,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:47,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:47,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:00:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:47,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:00:48,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:48,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270642550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:48,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:48,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:48,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988946147] [2021-11-20 06:00:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:48,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:48,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:48,122 INFO L87 Difference]: Start difference. First operand 571 states and 948 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:48,251 INFO L93 Difference]: Finished difference Result 1133 states and 1888 transitions. [2021-11-20 06:00:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:00:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2021-11-20 06:00:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:48,263 INFO L225 Difference]: With dead ends: 1133 [2021-11-20 06:00:48,267 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 06:00:48,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:48,280 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 14 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:48,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2795 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 06:00:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-20 06:00:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6875) internal successors, (756), 467 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 947 transitions. [2021-11-20 06:00:48,334 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 947 transitions. Word has length 113 [2021-11-20 06:00:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:48,337 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 947 transitions. [2021-11-20 06:00:48,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 947 transitions. [2021-11-20 06:00:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 06:00:48,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:48,350 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:48,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:48,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:48,569 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash 229491886, now seen corresponding path program 1 times [2021-11-20 06:00:48,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:48,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133765132] [2021-11-20 06:00:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:48,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:00:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:48,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:00:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133765132] [2021-11-20 06:00:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133765132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648256923] [2021-11-20 06:00:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:49,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:49,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:49,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:00:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:49,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:00:49,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:49,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648256923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:49,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:49,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:49,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592842125] [2021-11-20 06:00:49,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:49,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:49,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:49,815 INFO L87 Difference]: Start difference. First operand 571 states and 947 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:49,942 INFO L93 Difference]: Finished difference Result 1133 states and 1886 transitions. [2021-11-20 06:00:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:00:49,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-20 06:00:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:49,951 INFO L225 Difference]: With dead ends: 1133 [2021-11-20 06:00:49,951 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 06:00:49,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:49,958 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 12 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:49,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2795 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 06:00:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-20 06:00:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 448 states have (on average 1.6852678571428572) internal successors, (755), 467 states have internal predecessors, (755), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 946 transitions. [2021-11-20 06:00:50,000 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 946 transitions. Word has length 115 [2021-11-20 06:00:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:50,001 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 946 transitions. [2021-11-20 06:00:50,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 946 transitions. [2021-11-20 06:00:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 06:00:50,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:50,008 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:50,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:50,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:50,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:50,222 INFO L85 PathProgramCache]: Analyzing trace with hash 808115478, now seen corresponding path program 1 times [2021-11-20 06:00:50,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266281064] [2021-11-20 06:00:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:50,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:00:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:00:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:50,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:50,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266281064] [2021-11-20 06:00:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266281064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774420350] [2021-11-20 06:00:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:50,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:50,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:50,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:00:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:00:51,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:51,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774420350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:51,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:51,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:51,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451097560] [2021-11-20 06:00:51,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:51,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:51,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:51,326 INFO L87 Difference]: Start difference. First operand 571 states and 946 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:51,408 INFO L93 Difference]: Finished difference Result 1140 states and 1893 transitions. [2021-11-20 06:00:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:00:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-20 06:00:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:51,415 INFO L225 Difference]: With dead ends: 1140 [2021-11-20 06:00:51,416 INFO L226 Difference]: Without dead ends: 580 [2021-11-20 06:00:51,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:51,421 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 20 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:51,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2795 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-20 06:00:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-20 06:00:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 456 states have (on average 1.6820175438596492) internal successors, (767), 475 states have internal predecessors, (767), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 958 transitions. [2021-11-20 06:00:51,454 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 958 transitions. Word has length 117 [2021-11-20 06:00:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 958 transitions. [2021-11-20 06:00:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 958 transitions. [2021-11-20 06:00:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:00:51,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:51,460 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:51,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:51,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:51,689 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1483857368, now seen corresponding path program 1 times [2021-11-20 06:00:51,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:51,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653272758] [2021-11-20 06:00:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:51,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:00:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:00:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:00:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:52,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:52,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653272758] [2021-11-20 06:00:52,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653272758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286848453] [2021-11-20 06:00:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:52,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:52,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:52,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:52,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:00:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:00:52,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:52,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286848453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:52,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:52,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:52,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827491923] [2021-11-20 06:00:52,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:52,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:52,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:52,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:52,715 INFO L87 Difference]: Start difference. First operand 580 states and 958 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:52,809 INFO L93 Difference]: Finished difference Result 1142 states and 1894 transitions. [2021-11-20 06:00:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:00:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-20 06:00:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:52,816 INFO L225 Difference]: With dead ends: 1142 [2021-11-20 06:00:52,817 INFO L226 Difference]: Without dead ends: 580 [2021-11-20 06:00:52,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:52,822 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 18 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:52,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2795 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-20 06:00:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-20 06:00:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 456 states have (on average 1.6798245614035088) internal successors, (766), 475 states have internal predecessors, (766), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 957 transitions. [2021-11-20 06:00:52,853 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 957 transitions. Word has length 118 [2021-11-20 06:00:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 957 transitions. [2021-11-20 06:00:52,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 957 transitions. [2021-11-20 06:00:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 06:00:52,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:52,860 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:52,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:53,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:53,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash 707607642, now seen corresponding path program 1 times [2021-11-20 06:00:53,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650890341] [2021-11-20 06:00:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:53,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:00:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:00:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:00:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:00:53,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:53,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650890341] [2021-11-20 06:00:53,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650890341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395443526] [2021-11-20 06:00:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:53,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:53,521 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:53,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:00:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:00:54,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395443526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:54,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:54,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:54,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109155636] [2021-11-20 06:00:54,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:54,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:54,162 INFO L87 Difference]: Start difference. First operand 580 states and 957 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:54,248 INFO L93 Difference]: Finished difference Result 1142 states and 1893 transitions. [2021-11-20 06:00:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:00:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 119 [2021-11-20 06:00:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:54,255 INFO L225 Difference]: With dead ends: 1142 [2021-11-20 06:00:54,256 INFO L226 Difference]: Without dead ends: 580 [2021-11-20 06:00:54,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:54,261 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 17 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:54,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2795 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:00:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-20 06:00:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-20 06:00:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 456 states have (on average 1.6776315789473684) internal successors, (765), 475 states have internal predecessors, (765), 98 states have call successors, (98), 26 states have call predecessors, (98), 25 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:00:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 956 transitions. [2021-11-20 06:00:54,297 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 956 transitions. Word has length 119 [2021-11-20 06:00:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:54,297 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 956 transitions. [2021-11-20 06:00:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 956 transitions. [2021-11-20 06:00:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:00:54,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:54,304 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:54,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:54,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:54,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 151725420, now seen corresponding path program 1 times [2021-11-20 06:00:54,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882847154] [2021-11-20 06:00:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:54,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:00:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:00:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:00:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:00:54,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:54,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882847154] [2021-11-20 06:00:54,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882847154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741361143] [2021-11-20 06:00:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:54,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:54,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:55,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:00:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:00:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:55,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:55,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741361143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:55,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:55,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-20 06:00:55,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010517981] [2021-11-20 06:00:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:55,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:00:55,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:00:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:00:55,654 INFO L87 Difference]: Start difference. First operand 580 states and 956 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:00:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:55,777 INFO L93 Difference]: Finished difference Result 1161 states and 1923 transitions. [2021-11-20 06:00:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:00:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 120 [2021-11-20 06:00:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:55,784 INFO L225 Difference]: With dead ends: 1161 [2021-11-20 06:00:55,784 INFO L226 Difference]: Without dead ends: 603 [2021-11-20 06:00:55,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:00:55,789 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 148 mSDsluCounter, 4567 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5502 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:55,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5502 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:00:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-20 06:00:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 599. [2021-11-20 06:00:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 472 states have (on average 1.6758474576271187) internal successors, (791), 493 states have internal predecessors, (791), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-20 06:00:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 987 transitions. [2021-11-20 06:00:55,822 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 987 transitions. Word has length 120 [2021-11-20 06:00:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 987 transitions. [2021-11-20 06:00:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:00:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 987 transitions. [2021-11-20 06:00:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:00:55,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:55,829 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:55,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:56,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:56,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1282512045, now seen corresponding path program 1 times [2021-11-20 06:00:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:56,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784428156] [2021-11-20 06:00:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:56,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:00:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:00:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:00:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:00:56,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784428156] [2021-11-20 06:00:56,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784428156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783571197] [2021-11-20 06:00:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:56,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:56,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:56,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:00:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:57,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:57,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783571197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:57,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:57,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:57,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922712642] [2021-11-20 06:00:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:57,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:57,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:57,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:57,184 INFO L87 Difference]: Start difference. First operand 599 states and 987 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:57,340 INFO L93 Difference]: Finished difference Result 1202 states and 1997 transitions. [2021-11-20 06:00:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:00:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-20 06:00:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:57,351 INFO L225 Difference]: With dead ends: 1202 [2021-11-20 06:00:57,351 INFO L226 Difference]: Without dead ends: 599 [2021-11-20 06:00:57,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:57,356 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 135 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:57,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2612 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:00:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-20 06:00:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-20 06:00:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 472 states have (on average 1.6652542372881356) internal successors, (786), 493 states have internal predecessors, (786), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-20 06:00:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 982 transitions. [2021-11-20 06:00:57,391 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 982 transitions. Word has length 120 [2021-11-20 06:00:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:57,391 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 982 transitions. [2021-11-20 06:00:57,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 982 transitions. [2021-11-20 06:00:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 06:00:57,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:57,398 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:57,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:57,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:00:57,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1441953085, now seen corresponding path program 1 times [2021-11-20 06:00:57,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:57,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381391269] [2021-11-20 06:00:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:57,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:00:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:00:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:00:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:00:58,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381391269] [2021-11-20 06:00:58,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381391269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924059726] [2021-11-20 06:00:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:58,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:58,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:58,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:58,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:00:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:58,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:00:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:00:58,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:00:58,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924059726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:00:58,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:00:58,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:00:58,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680341124] [2021-11-20 06:00:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:00:58,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:00:58,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:00:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:00:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:00:58,707 INFO L87 Difference]: Start difference. First operand 599 states and 982 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:00:58,863 INFO L93 Difference]: Finished difference Result 1202 states and 1987 transitions. [2021-11-20 06:00:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:00:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-20 06:00:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:00:58,870 INFO L225 Difference]: With dead ends: 1202 [2021-11-20 06:00:58,871 INFO L226 Difference]: Without dead ends: 599 [2021-11-20 06:00:58,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:00:58,877 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 129 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:00:58,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2612 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:00:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-20 06:00:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-20 06:00:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 472 states have (on average 1.6546610169491525) internal successors, (781), 493 states have internal predecessors, (781), 99 states have call successors, (99), 26 states have call predecessors, (99), 27 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-20 06:00:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 977 transitions. [2021-11-20 06:00:58,909 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 977 transitions. Word has length 122 [2021-11-20 06:00:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:00:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 977 transitions. [2021-11-20 06:00:58,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:00:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 977 transitions. [2021-11-20 06:00:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:00:58,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:00:58,916 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:00:58,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:00:59,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:59,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:00:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:00:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1684119539, now seen corresponding path program 1 times [2021-11-20 06:00:59,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:00:59,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401216170] [2021-11-20 06:00:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:59,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:00:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:00:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:00:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:00:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:00:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:00:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:00:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:00:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:00:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:00:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:00:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:00:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:00:59,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:00:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401216170] [2021-11-20 06:00:59,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401216170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:00:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943054139] [2021-11-20 06:00:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:00:59,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:00:59,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:00:59,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:00:59,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:00:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:00:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:00:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:00,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943054139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:00,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:00,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:01:00,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083909997] [2021-11-20 06:01:00,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:00,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:00,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:01:00,131 INFO L87 Difference]: Start difference. First operand 599 states and 977 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:00,296 INFO L93 Difference]: Finished difference Result 1238 states and 2035 transitions. [2021-11-20 06:01:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-11-20 06:01:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:00,303 INFO L225 Difference]: With dead ends: 1238 [2021-11-20 06:01:00,303 INFO L226 Difference]: Without dead ends: 665 [2021-11-20 06:01:00,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:00,307 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 179 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:00,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2622 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:00,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-20 06:01:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 650. [2021-11-20 06:01:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 522 states have (on average 1.6590038314176245) internal successors, (866), 543 states have internal predecessors, (866), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1061 transitions. [2021-11-20 06:01:00,339 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1061 transitions. Word has length 124 [2021-11-20 06:01:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:00,339 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1061 transitions. [2021-11-20 06:01:00,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1061 transitions. [2021-11-20 06:01:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:01:00,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:00,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:01:00,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:00,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:01:00,573 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -241041615, now seen corresponding path program 1 times [2021-11-20 06:01:00,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264184380] [2021-11-20 06:01:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:00,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:01:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:01,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:01:01,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:01,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264184380] [2021-11-20 06:01:01,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264184380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:01,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566744778] [2021-11-20 06:01:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:01,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:01,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:01,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:01:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:01,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:01:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:01,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:01,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566744778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:01,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:01,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-20 06:01:01,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805054202] [2021-11-20 06:01:01,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:01:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:01:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:01,647 INFO L87 Difference]: Start difference. First operand 650 states and 1061 transitions. Second operand has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:01,829 INFO L93 Difference]: Finished difference Result 1230 states and 2015 transitions. [2021-11-20 06:01:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:01:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-20 06:01:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:01,836 INFO L225 Difference]: With dead ends: 1230 [2021-11-20 06:01:01,837 INFO L226 Difference]: Without dead ends: 672 [2021-11-20 06:01:01,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:01:01,841 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 177 mSDsluCounter, 5388 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6303 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:01,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6303 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-11-20 06:01:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 650. [2021-11-20 06:01:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 522 states have (on average 1.6590038314176245) internal successors, (866), 543 states have internal predecessors, (866), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1061 transitions. [2021-11-20 06:01:01,873 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1061 transitions. Word has length 125 [2021-11-20 06:01:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:01,873 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1061 transitions. [2021-11-20 06:01:01,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1061 transitions. [2021-11-20 06:01:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:01:01,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:01,879 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:02,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:01:02,093 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1302019153, now seen corresponding path program 1 times [2021-11-20 06:01:02,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:02,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657447363] [2021-11-20 06:01:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:02,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:01:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:01:02,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657447363] [2021-11-20 06:01:02,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657447363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:02,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699540422] [2021-11-20 06:01:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:02,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:02,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:02,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:02,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:01:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:01:02,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:01:03,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:03,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699540422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:03,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:03,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:01:03,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824146813] [2021-11-20 06:01:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:03,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:03,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:03,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:03,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:01:03,071 INFO L87 Difference]: Start difference. First operand 650 states and 1061 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:03,231 INFO L93 Difference]: Finished difference Result 1238 states and 2033 transitions. [2021-11-20 06:01:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2021-11-20 06:01:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:03,238 INFO L225 Difference]: With dead ends: 1238 [2021-11-20 06:01:03,238 INFO L226 Difference]: Without dead ends: 650 [2021-11-20 06:01:03,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:03,243 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 173 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:03,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2622 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-20 06:01:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-11-20 06:01:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 522 states have (on average 1.6494252873563218) internal successors, (861), 543 states have internal predecessors, (861), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1056 transitions. [2021-11-20 06:01:03,272 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1056 transitions. Word has length 125 [2021-11-20 06:01:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:03,272 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 1056 transitions. [2021-11-20 06:01:03,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1056 transitions. [2021-11-20 06:01:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 06:01:03,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:03,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:01:03,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:03,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:03,505 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1227624304, now seen corresponding path program 1 times [2021-11-20 06:01:03,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:03,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088045322] [2021-11-20 06:01:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:03,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:01:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:03,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:04,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:04,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:01:04,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088045322] [2021-11-20 06:01:04,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088045322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333524570] [2021-11-20 06:01:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:04,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:04,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:04,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:01:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:01:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:01:04,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333524570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:04,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:04,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2021-11-20 06:01:04,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789670052] [2021-11-20 06:01:04,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:04,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:01:04,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:01:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:01:04,640 INFO L87 Difference]: Start difference. First operand 650 states and 1056 transitions. Second operand has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:04,818 INFO L93 Difference]: Finished difference Result 1165 states and 1907 transitions. [2021-11-20 06:01:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 125 [2021-11-20 06:01:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:04,825 INFO L225 Difference]: With dead ends: 1165 [2021-11-20 06:01:04,825 INFO L226 Difference]: Without dead ends: 674 [2021-11-20 06:01:04,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:01:04,831 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 134 mSDsluCounter, 4534 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5461 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:04,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5461 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-11-20 06:01:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 669. [2021-11-20 06:01:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 538 states have (on average 1.6486988847583643) internal successors, (887), 561 states have internal predecessors, (887), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1086 transitions. [2021-11-20 06:01:04,862 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1086 transitions. Word has length 125 [2021-11-20 06:01:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:04,862 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1086 transitions. [2021-11-20 06:01:04,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1086 transitions. [2021-11-20 06:01:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 06:01:04,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:04,868 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:04,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:05,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:05,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1149423119, now seen corresponding path program 1 times [2021-11-20 06:01:05,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:05,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722632564] [2021-11-20 06:01:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:05,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:01:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:05,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722632564] [2021-11-20 06:01:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722632564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745775439] [2021-11-20 06:01:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:05,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:05,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:05,613 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:05,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:01:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:01:05,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:01:06,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:06,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745775439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:06,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:06,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 06:01:06,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752160499] [2021-11-20 06:01:06,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:06,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:01:06,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:01:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:01:06,154 INFO L87 Difference]: Start difference. First operand 669 states and 1086 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:06,284 INFO L93 Difference]: Finished difference Result 1195 states and 1958 transitions. [2021-11-20 06:01:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 126 [2021-11-20 06:01:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:06,291 INFO L225 Difference]: With dead ends: 1195 [2021-11-20 06:01:06,292 INFO L226 Difference]: Without dead ends: 704 [2021-11-20 06:01:06,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:01:06,296 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 143 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5451 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:06,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5451 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-20 06:01:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 669. [2021-11-20 06:01:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 538 states have (on average 1.6486988847583643) internal successors, (887), 561 states have internal predecessors, (887), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1086 transitions. [2021-11-20 06:01:06,363 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1086 transitions. Word has length 126 [2021-11-20 06:01:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:06,364 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1086 transitions. [2021-11-20 06:01:06,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1086 transitions. [2021-11-20 06:01:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 06:01:06,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:06,371 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:06,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:06,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:01:06,592 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash 183126671, now seen corresponding path program 1 times [2021-11-20 06:01:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:06,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454078799] [2021-11-20 06:01:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:06,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:01:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:07,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:07,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454078799] [2021-11-20 06:01:07,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454078799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:07,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228331214] [2021-11-20 06:01:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:07,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:07,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:07,154 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:07,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:01:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:01:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:01:07,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228331214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:07,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:07,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 06:01:07,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422210633] [2021-11-20 06:01:07,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:07,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:01:07,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:01:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:01:07,722 INFO L87 Difference]: Start difference. First operand 669 states and 1086 transitions. Second operand has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:07,965 INFO L93 Difference]: Finished difference Result 1180 states and 1932 transitions. [2021-11-20 06:01:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:01:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 126 [2021-11-20 06:01:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:07,972 INFO L225 Difference]: With dead ends: 1180 [2021-11-20 06:01:07,972 INFO L226 Difference]: Without dead ends: 689 [2021-11-20 06:01:07,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:01:07,978 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 177 mSDsluCounter, 5394 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:07,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:01:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-11-20 06:01:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 669. [2021-11-20 06:01:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 538 states have (on average 1.6486988847583643) internal successors, (887), 561 states have internal predecessors, (887), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1086 transitions. [2021-11-20 06:01:08,012 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1086 transitions. Word has length 126 [2021-11-20 06:01:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:08,012 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1086 transitions. [2021-11-20 06:01:08,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1086 transitions. [2021-11-20 06:01:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 06:01:08,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:08,019 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:08,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:08,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:08,233 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash 601705896, now seen corresponding path program 1 times [2021-11-20 06:01:08,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:08,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717459292] [2021-11-20 06:01:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:08,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:01:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:01:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717459292] [2021-11-20 06:01:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717459292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035833953] [2021-11-20 06:01:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:08,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:01:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:01:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:01:09,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035833953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:09,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:09,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-20 06:01:09,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948041844] [2021-11-20 06:01:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:09,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:09,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:09,211 INFO L87 Difference]: Start difference. First operand 669 states and 1086 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:09,267 INFO L93 Difference]: Finished difference Result 1232 states and 2017 transitions. [2021-11-20 06:01:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:09,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 126 [2021-11-20 06:01:09,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:09,273 INFO L225 Difference]: With dead ends: 1232 [2021-11-20 06:01:09,274 INFO L226 Difference]: Without dead ends: 669 [2021-11-20 06:01:09,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:01:09,277 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 23 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:09,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2764 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-20 06:01:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 669. [2021-11-20 06:01:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 538 states have (on average 1.641263940520446) internal successors, (883), 561 states have internal predecessors, (883), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1082 transitions. [2021-11-20 06:01:09,305 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1082 transitions. Word has length 126 [2021-11-20 06:01:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:09,305 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1082 transitions. [2021-11-20 06:01:09,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1082 transitions. [2021-11-20 06:01:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:01:09,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:09,311 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:09,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:09,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:01:09,537 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1246575496, now seen corresponding path program 1 times [2021-11-20 06:01:09,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854528873] [2021-11-20 06:01:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:09,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:01:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:09,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:10,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854528873] [2021-11-20 06:01:10,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854528873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801134744] [2021-11-20 06:01:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:10,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:10,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:10,013 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:01:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:10,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:01:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:01:10,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:10,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801134744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:10,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:10,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2021-11-20 06:01:10,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051716757] [2021-11-20 06:01:10,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:10,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:01:10,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:01:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:01:10,577 INFO L87 Difference]: Start difference. First operand 669 states and 1082 transitions. Second operand has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:10,755 INFO L93 Difference]: Finished difference Result 1180 states and 1929 transitions. [2021-11-20 06:01:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:01:10,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-11-20 06:01:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:10,761 INFO L225 Difference]: With dead ends: 1180 [2021-11-20 06:01:10,761 INFO L226 Difference]: Without dead ends: 689 [2021-11-20 06:01:10,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:01:10,765 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 185 mSDsluCounter, 5356 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6267 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:10,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6267 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-11-20 06:01:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 669. [2021-11-20 06:01:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 538 states have (on average 1.641263940520446) internal successors, (883), 561 states have internal predecessors, (883), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1082 transitions. [2021-11-20 06:01:10,793 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1082 transitions. Word has length 127 [2021-11-20 06:01:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:10,793 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1082 transitions. [2021-11-20 06:01:10,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:01:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1082 transitions. [2021-11-20 06:01:10,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:01:10,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:10,800 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:10,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:11,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:01:11,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1377814732, now seen corresponding path program 1 times [2021-11-20 06:01:11,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:11,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178860832] [2021-11-20 06:01:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:11,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:01:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178860832] [2021-11-20 06:01:11,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178860832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112309149] [2021-11-20 06:01:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:11,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:11,472 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:11,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:01:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:01:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:11,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112309149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:11,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:11,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-11-20 06:01:11,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994528592] [2021-11-20 06:01:11,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:11,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:11,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:11,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:01:11,966 INFO L87 Difference]: Start difference. First operand 669 states and 1082 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:12,034 INFO L93 Difference]: Finished difference Result 1288 states and 2099 transitions. [2021-11-20 06:01:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:01:12,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2021-11-20 06:01:12,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:12,041 INFO L225 Difference]: With dead ends: 1288 [2021-11-20 06:01:12,041 INFO L226 Difference]: Without dead ends: 705 [2021-11-20 06:01:12,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:12,045 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 38 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:12,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2740 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-20 06:01:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 693. [2021-11-20 06:01:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 562 states have (on average 1.6209964412811388) internal successors, (911), 585 states have internal predecessors, (911), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1110 transitions. [2021-11-20 06:01:12,096 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1110 transitions. Word has length 128 [2021-11-20 06:01:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:12,097 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1110 transitions. [2021-11-20 06:01:12,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1110 transitions. [2021-11-20 06:01:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:01:12,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:12,103 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:12,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:12,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:01:12,325 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:12,326 INFO L85 PathProgramCache]: Analyzing trace with hash -363713341, now seen corresponding path program 1 times [2021-11-20 06:01:12,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:12,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471974028] [2021-11-20 06:01:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:12,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:01:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:01:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:01:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:01:12,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:12,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471974028] [2021-11-20 06:01:12,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471974028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711318793] [2021-11-20 06:01:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:12,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:12,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:12,713 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:12,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:01:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:01:12,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:01:13,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:13,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711318793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:13,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:13,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-20 06:01:13,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776343931] [2021-11-20 06:01:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:13,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:01:13,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:01:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:13,161 INFO L87 Difference]: Start difference. First operand 693 states and 1110 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:13,383 INFO L93 Difference]: Finished difference Result 1300 states and 2131 transitions. [2021-11-20 06:01:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 128 [2021-11-20 06:01:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:13,390 INFO L225 Difference]: With dead ends: 1300 [2021-11-20 06:01:13,391 INFO L226 Difference]: Without dead ends: 814 [2021-11-20 06:01:13,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:01:13,394 INFO L933 BasicCegarLoop]: 1035 mSDtfsCounter, 324 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:13,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 3853 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:01:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-20 06:01:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 696. [2021-11-20 06:01:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 565 states have (on average 1.6176991150442477) internal successors, (914), 588 states have internal predecessors, (914), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1113 transitions. [2021-11-20 06:01:13,427 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1113 transitions. Word has length 128 [2021-11-20 06:01:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:13,428 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1113 transitions. [2021-11-20 06:01:13,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 06:01:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1113 transitions. [2021-11-20 06:01:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:01:13,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:13,434 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:13,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:13,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:13,647 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -913115755, now seen corresponding path program 1 times [2021-11-20 06:01:13,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:13,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257675863] [2021-11-20 06:01:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:13,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:13,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:01:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:14,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257675863] [2021-11-20 06:01:14,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257675863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:14,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132736847] [2021-11-20 06:01:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:14,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:14,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:14,065 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:14,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:01:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:01:14,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:01:14,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:14,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132736847] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:14,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:14,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-20 06:01:14,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340923003] [2021-11-20 06:01:14,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:14,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:01:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:01:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:14,710 INFO L87 Difference]: Start difference. First operand 696 states and 1113 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:01:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:15,240 INFO L93 Difference]: Finished difference Result 745 states and 1185 transitions. [2021-11-20 06:01:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:15,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 131 [2021-11-20 06:01:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:15,247 INFO L225 Difference]: With dead ends: 745 [2021-11-20 06:01:15,247 INFO L226 Difference]: Without dead ends: 730 [2021-11-20 06:01:15,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:15,249 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 910 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:15,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 2403 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:01:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-20 06:01:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 699. [2021-11-20 06:01:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 568 states have (on average 1.6144366197183098) internal successors, (917), 591 states have internal predecessors, (917), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1116 transitions. [2021-11-20 06:01:15,282 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1116 transitions. Word has length 131 [2021-11-20 06:01:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:15,282 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1116 transitions. [2021-11-20 06:01:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-20 06:01:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1116 transitions. [2021-11-20 06:01:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:01:15,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:15,289 INFO L514 BasicCegarLoop]: trace histogram [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 06:01:15,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:15,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:15,513 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash -408020048, now seen corresponding path program 1 times [2021-11-20 06:01:15,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884321992] [2021-11-20 06:01:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:15,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:01:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:15,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884321992] [2021-11-20 06:01:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884321992] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:15,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605880400] [2021-11-20 06:01:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:15,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:15,919 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:15,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:01:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:01:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:01:16,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:16,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605880400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:16,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:16,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-20 06:01:16,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606425715] [2021-11-20 06:01:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:01:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:01:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:01:16,472 INFO L87 Difference]: Start difference. First operand 699 states and 1116 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:01:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:16,534 INFO L93 Difference]: Finished difference Result 716 states and 1137 transitions. [2021-11-20 06:01:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:01:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 137 [2021-11-20 06:01:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:16,541 INFO L225 Difference]: With dead ends: 716 [2021-11-20 06:01:16,541 INFO L226 Difference]: Without dead ends: 701 [2021-11-20 06:01:16,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:01:16,543 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 37 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3696 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:16,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3696 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-20 06:01:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 699. [2021-11-20 06:01:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 568 states have (on average 1.6126760563380282) internal successors, (916), 591 states have internal predecessors, (916), 100 states have call successors, (100), 27 states have call predecessors, (100), 30 states have return successors, (99), 93 states have call predecessors, (99), 95 states have call successors, (99) [2021-11-20 06:01:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1115 transitions. [2021-11-20 06:01:16,574 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1115 transitions. Word has length 137 [2021-11-20 06:01:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1115 transitions. [2021-11-20 06:01:16,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-20 06:01:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1115 transitions. [2021-11-20 06:01:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-20 06:01:16,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:16,582 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:16,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:16,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:16,807 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1895807243, now seen corresponding path program 1 times [2021-11-20 06:01:16,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:16,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114275977] [2021-11-20 06:01:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:16,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:01:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:01:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:17,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114275977] [2021-11-20 06:01:17,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114275977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555336476] [2021-11-20 06:01:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:17,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:17,197 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:17,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:01:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:01:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:01:17,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555336476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:17,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-11-20 06:01:17,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508594228] [2021-11-20 06:01:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:17,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:01:17,670 INFO L87 Difference]: Start difference. First operand 699 states and 1115 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:17,722 INFO L93 Difference]: Finished difference Result 1372 states and 2200 transitions. [2021-11-20 06:01:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 148 [2021-11-20 06:01:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:17,735 INFO L225 Difference]: With dead ends: 1372 [2021-11-20 06:01:17,735 INFO L226 Difference]: Without dead ends: 668 [2021-11-20 06:01:17,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:01:17,739 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 11 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2763 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:17,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2763 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:01:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-20 06:01:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-11-20 06:01:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 540 states have (on average 1.6111111111111112) internal successors, (870), 561 states have internal predecessors, (870), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1065 transitions. [2021-11-20 06:01:17,768 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1065 transitions. Word has length 148 [2021-11-20 06:01:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1065 transitions. [2021-11-20 06:01:17,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1065 transitions. [2021-11-20 06:01:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 06:01:17,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:17,775 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:17,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:17,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:17,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:17,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1309592096, now seen corresponding path program 1 times [2021-11-20 06:01:17,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274462037] [2021-11-20 06:01:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:17,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:01:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:01:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:01:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:01:18,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274462037] [2021-11-20 06:01:18,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274462037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370593926] [2021-11-20 06:01:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:18,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:18,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:18,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:01:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1908 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:01:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:19,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370593926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:19,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 12 [2021-11-20 06:01:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173702456] [2021-11-20 06:01:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:01:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:01:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:01:19,033 INFO L87 Difference]: Start difference. First operand 668 states and 1065 transitions. Second operand has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:19,151 INFO L93 Difference]: Finished difference Result 1305 states and 2094 transitions. [2021-11-20 06:01:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:01:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 150 [2021-11-20 06:01:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:19,179 INFO L225 Difference]: With dead ends: 1305 [2021-11-20 06:01:19,181 INFO L226 Difference]: Without dead ends: 668 [2021-11-20 06:01:19,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:19,185 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 143 mSDsluCounter, 4539 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5481 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:19,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5481 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-20 06:01:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 647. [2021-11-20 06:01:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 519 states have (on average 1.6107899807321773) internal successors, (836), 540 states have internal predecessors, (836), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1031 transitions. [2021-11-20 06:01:19,218 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1031 transitions. Word has length 150 [2021-11-20 06:01:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:19,218 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1031 transitions. [2021-11-20 06:01:19,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1031 transitions. [2021-11-20 06:01:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 06:01:19,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:19,226 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:19,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:01:19,441 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1927910811, now seen corresponding path program 1 times [2021-11-20 06:01:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785786102] [2021-11-20 06:01:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:19,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:01:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:01:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:19,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:01:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:20,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785786102] [2021-11-20 06:01:20,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785786102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:20,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948416448] [2021-11-20 06:01:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:20,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:20,031 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:20,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:01:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:01:20,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:01:20,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:20,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948416448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:20,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:20,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-11-20 06:01:20,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425017839] [2021-11-20 06:01:20,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:20,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:01:20,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:01:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:20,623 INFO L87 Difference]: Start difference. First operand 647 states and 1031 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:20,708 INFO L93 Difference]: Finished difference Result 1263 states and 2028 transitions. [2021-11-20 06:01:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:01:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-20 06:01:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:20,714 INFO L225 Difference]: With dead ends: 1263 [2021-11-20 06:01:20,715 INFO L226 Difference]: Without dead ends: 647 [2021-11-20 06:01:20,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:20,718 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 176 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:20,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2596 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-20 06:01:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2021-11-20 06:01:20,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 519 states have (on average 1.6088631984585742) internal successors, (835), 540 states have internal predecessors, (835), 99 states have call successors, (99), 27 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-20 06:01:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1030 transitions. [2021-11-20 06:01:20,747 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1030 transitions. Word has length 152 [2021-11-20 06:01:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:20,747 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1030 transitions. [2021-11-20 06:01:20,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1030 transitions. [2021-11-20 06:01:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-20 06:01:20,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:20,753 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:20,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:20,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 06:01:20,972 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash -525693395, now seen corresponding path program 1 times [2021-11-20 06:01:20,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599990264] [2021-11-20 06:01:20,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:20,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:01:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:01:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:01:21,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599990264] [2021-11-20 06:01:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599990264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:21,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:21,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:01:21,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457051284] [2021-11-20 06:01:21,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:21,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:01:21,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:01:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:01:21,430 INFO L87 Difference]: Start difference. First operand 647 states and 1030 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:27,536 INFO L93 Difference]: Finished difference Result 1528 states and 2493 transitions. [2021-11-20 06:01:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:01:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 153 [2021-11-20 06:01:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:27,544 INFO L225 Difference]: With dead ends: 1528 [2021-11-20 06:01:27,545 INFO L226 Difference]: Without dead ends: 898 [2021-11-20 06:01:27,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:01:27,549 INFO L933 BasicCegarLoop]: 955 mSDtfsCounter, 974 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:27,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 2408 Invalid, 2975 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [273 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-20 06:01:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-20 06:01:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 607. [2021-11-20 06:01:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 482 states have (on average 1.6016597510373445) internal successors, (772), 501 states have internal predecessors, (772), 98 states have call successors, (98), 27 states have call predecessors, (98), 26 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:01:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 963 transitions. [2021-11-20 06:01:27,667 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 963 transitions. Word has length 153 [2021-11-20 06:01:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:27,668 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 963 transitions. [2021-11-20 06:01:27,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 963 transitions. [2021-11-20 06:01:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 06:01:27,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:27,673 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:27,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:01:27,673 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 397255901, now seen corresponding path program 1 times [2021-11-20 06:01:27,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397075442] [2021-11-20 06:01:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:27,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:27,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:01:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:01:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:01:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:01:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:01:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:01:28,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:28,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397075442] [2021-11-20 06:01:28,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397075442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:28,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:28,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:01:28,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227576873] [2021-11-20 06:01:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:01:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:01:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:01:28,250 INFO L87 Difference]: Start difference. First operand 607 states and 963 transitions. Second operand has 16 states, 15 states have (on average 7.6) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:37,802 INFO L93 Difference]: Finished difference Result 1456 states and 2387 transitions. [2021-11-20 06:01:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:01:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.6) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 154 [2021-11-20 06:01:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:37,810 INFO L225 Difference]: With dead ends: 1456 [2021-11-20 06:01:37,810 INFO L226 Difference]: Without dead ends: 950 [2021-11-20 06:01:37,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:01:37,814 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 1541 mSDsluCounter, 6368 mSDsCounter, 0 mSdLazyCounter, 10268 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 7369 SdHoareTripleChecker+Invalid, 10753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 10268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:37,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1616 Valid, 7369 Invalid, 10753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [485 Valid, 10268 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 06:01:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-20 06:01:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 614. [2021-11-20 06:01:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 487 states have (on average 1.593429158110883) internal successors, (776), 506 states have internal predecessors, (776), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 93 states have call predecessors, (98), 93 states have call successors, (98) [2021-11-20 06:01:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 972 transitions. [2021-11-20 06:01:37,904 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 972 transitions. Word has length 154 [2021-11-20 06:01:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 972 transitions. [2021-11-20 06:01:37,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.6) internal successors, (114), 10 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 972 transitions. [2021-11-20 06:01:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:01:37,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:37,910 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:37,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:01:37,910 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 694299362, now seen corresponding path program 1 times [2021-11-20 06:01:37,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:37,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365993815] [2021-11-20 06:01:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:37,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:01:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 06:01:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:01:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:01:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:01:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:01:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:01:38,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:38,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365993815] [2021-11-20 06:01:38,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365993815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:38,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:38,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-20 06:01:38,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630060762] [2021-11-20 06:01:38,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:38,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:01:38,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:01:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:01:38,419 INFO L87 Difference]: Start difference. First operand 614 states and 972 transitions. Second operand has 15 states, 14 states have (on average 8.357142857142858) internal successors, (117), 9 states have internal predecessors, (117), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:47,184 INFO L93 Difference]: Finished difference Result 1507 states and 2459 transitions. [2021-11-20 06:01:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:01:47,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 8.357142857142858) internal successors, (117), 9 states have internal predecessors, (117), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-20 06:01:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:47,191 INFO L225 Difference]: With dead ends: 1507 [2021-11-20 06:01:47,191 INFO L226 Difference]: Without dead ends: 936 [2021-11-20 06:01:47,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:01:47,195 INFO L933 BasicCegarLoop]: 961 mSDtfsCounter, 1504 mSDsluCounter, 5796 mSDsCounter, 0 mSdLazyCounter, 9096 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 6757 SdHoareTripleChecker+Invalid, 9560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 9096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:47,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 6757 Invalid, 9560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [464 Valid, 9096 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 06:01:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-11-20 06:01:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 603. [2021-11-20 06:01:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 476 states have (on average 1.6029411764705883) internal successors, (763), 494 states have internal predecessors, (763), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 94 states have call predecessors, (98), 93 states have call successors, (98) [2021-11-20 06:01:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 959 transitions. [2021-11-20 06:01:47,286 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 959 transitions. Word has length 156 [2021-11-20 06:01:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:47,287 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 959 transitions. [2021-11-20 06:01:47,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 8.357142857142858) internal successors, (117), 9 states have internal predecessors, (117), 3 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 959 transitions. [2021-11-20 06:01:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:01:47,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:47,292 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:47,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 06:01:47,292 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:47,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1666685116, now seen corresponding path program 1 times [2021-11-20 06:01:47,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613951226] [2021-11-20 06:01:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:47,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:01:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 06:01:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:01:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:01:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:01:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:01:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:01:47,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613951226] [2021-11-20 06:01:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613951226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:47,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:47,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:01:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482127656] [2021-11-20 06:01:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:01:47,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:01:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:01:47,825 INFO L87 Difference]: Start difference. First operand 603 states and 959 transitions. Second operand has 12 states, 11 states have (on average 10.545454545454545) internal successors, (116), 8 states have internal predecessors, (116), 3 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:54,922 INFO L93 Difference]: Finished difference Result 1514 states and 2462 transitions. [2021-11-20 06:01:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:01:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.545454545454545) internal successors, (116), 8 states have internal predecessors, (116), 3 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 156 [2021-11-20 06:01:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:54,929 INFO L225 Difference]: With dead ends: 1514 [2021-11-20 06:01:54,929 INFO L226 Difference]: Without dead ends: 948 [2021-11-20 06:01:54,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:01:54,933 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 1514 mSDsluCounter, 3874 mSDsCounter, 0 mSdLazyCounter, 6518 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 4795 SdHoareTripleChecker+Invalid, 6970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 6518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:54,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 4795 Invalid, 6970 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [452 Valid, 6518 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-20 06:01:54,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-11-20 06:01:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 610. [2021-11-20 06:01:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 483 states have (on average 1.5942028985507246) internal successors, (770), 501 states have internal predecessors, (770), 98 states have call successors, (98), 27 states have call predecessors, (98), 28 states have return successors, (98), 94 states have call predecessors, (98), 93 states have call successors, (98) [2021-11-20 06:01:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 966 transitions. [2021-11-20 06:01:55,033 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 966 transitions. Word has length 156 [2021-11-20 06:01:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:55,034 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 966 transitions. [2021-11-20 06:01:55,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.545454545454545) internal successors, (116), 8 states have internal predecessors, (116), 3 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:01:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 966 transitions. [2021-11-20 06:01:55,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 06:01:55,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:55,039 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:55,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:01:55,040 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash -174850532, now seen corresponding path program 1 times [2021-11-20 06:01:55,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:55,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545778579] [2021-11-20 06:01:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:55,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:01:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:01:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:01:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:01:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:01:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:01:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:01:55,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545778579] [2021-11-20 06:01:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545778579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:01:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565615246] [2021-11-20 06:01:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:55,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:01:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:01:55,569 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:01:55,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:01:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:01:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:01:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:01:56,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:01:56,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565615246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:56,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:01:56,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 13 [2021-11-20 06:01:56,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096310644] [2021-11-20 06:01:56,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:01:56,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:01:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:56,131 INFO L87 Difference]: Start difference. First operand 610 states and 966 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:01:56,349 INFO L93 Difference]: Finished difference Result 1574 states and 2589 transitions. [2021-11-20 06:01:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:01:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 160 [2021-11-20 06:01:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:01:56,362 INFO L225 Difference]: With dead ends: 1574 [2021-11-20 06:01:56,362 INFO L226 Difference]: Without dead ends: 1071 [2021-11-20 06:01:56,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:01:56,367 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 848 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:01:56,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 1806 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:01:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-11-20 06:01:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1056. [2021-11-20 06:01:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 830 states have (on average 1.5963855421686748) internal successors, (1325), 861 states have internal predecessors, (1325), 176 states have call successors, (176), 46 states have call predecessors, (176), 49 states have return successors, (200), 174 states have call predecessors, (200), 171 states have call successors, (200) [2021-11-20 06:01:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1701 transitions. [2021-11-20 06:01:56,538 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1701 transitions. Word has length 160 [2021-11-20 06:01:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:01:56,539 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1701 transitions. [2021-11-20 06:01:56,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-20 06:01:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1701 transitions. [2021-11-20 06:01:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-20 06:01:56,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:01:56,544 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:01:56,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:01:56,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:01:56,759 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:01:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:01:56,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1258464303, now seen corresponding path program 1 times [2021-11-20 06:01:56,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:01:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754586115] [2021-11-20 06:01:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:01:56,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:01:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:01:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:01:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:01:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:56,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:01:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:01:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:01:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:01:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:01:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:01:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:01:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:01:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:01:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:01:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:01:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:01:57,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:01:57,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754586115] [2021-11-20 06:01:57,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754586115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:01:57,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:01:57,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:01:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781386695] [2021-11-20 06:01:57,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:01:57,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:01:57,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:01:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:01:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:01:57,280 INFO L87 Difference]: Start difference. First operand 1056 states and 1701 transitions. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:02:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:09,839 INFO L93 Difference]: Finished difference Result 3800 states and 6451 transitions. [2021-11-20 06:02:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:02:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2021-11-20 06:02:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:09,875 INFO L225 Difference]: With dead ends: 3800 [2021-11-20 06:02:09,876 INFO L226 Difference]: Without dead ends: 2851 [2021-11-20 06:02:09,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:02:09,883 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 2658 mSDsluCounter, 3493 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 4482 SdHoareTripleChecker+Invalid, 8401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:09,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 4482 Invalid, 8401 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [974 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-11-20 06:02:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-20 06:02:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2060. [2021-11-20 06:02:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1617 states have (on average 1.6147186147186148) internal successors, (2611), 1668 states have internal predecessors, (2611), 349 states have call successors, (349), 82 states have call predecessors, (349), 93 states have return successors, (402), 357 states have call predecessors, (402), 344 states have call successors, (402) [2021-11-20 06:02:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3362 transitions. [2021-11-20 06:02:10,262 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3362 transitions. Word has length 161 [2021-11-20 06:02:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:10,262 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3362 transitions. [2021-11-20 06:02:10,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-20 06:02:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3362 transitions. [2021-11-20 06:02:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 06:02:10,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:10,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:02:10,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-20 06:02:10,267 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash -709059954, now seen corresponding path program 1 times [2021-11-20 06:02:10,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218447319] [2021-11-20 06:02:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:10,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:02:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:02:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:02:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:02:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:02:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:02:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:02:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:02:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:02:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:02:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-20 06:02:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:02:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:02:10,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218447319] [2021-11-20 06:02:10,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218447319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:10,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961469151] [2021-11-20 06:02:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:10,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:10,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:10,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:10,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:02:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1941 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:02:11,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:02:11,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:02:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961469151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:11,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:02:11,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 13 [2021-11-20 06:02:11,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717364669] [2021-11-20 06:02:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:11,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:02:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:02:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:02:11,398 INFO L87 Difference]: Start difference. First operand 2060 states and 3362 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:02:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:11,927 INFO L93 Difference]: Finished difference Result 4393 states and 7310 transitions. [2021-11-20 06:02:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:02:11,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 165 [2021-11-20 06:02:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:11,945 INFO L225 Difference]: With dead ends: 4393 [2021-11-20 06:02:11,945 INFO L226 Difference]: Without dead ends: 2776 [2021-11-20 06:02:11,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:02:11,957 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 908 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:11,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 1639 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:02:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-11-20 06:02:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2761. [2021-11-20 06:02:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2166 states have (on average 1.5974145891043399) internal successors, (3460), 2228 states have internal predecessors, (3460), 462 states have call successors, (462), 117 states have call predecessors, (462), 132 states have return successors, (614), 475 states have call predecessors, (614), 457 states have call successors, (614) [2021-11-20 06:02:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4536 transitions. [2021-11-20 06:02:12,475 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4536 transitions. Word has length 165 [2021-11-20 06:02:12,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:12,475 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 4536 transitions. [2021-11-20 06:02:12,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 06:02:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4536 transitions. [2021-11-20 06:02:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:02:12,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:12,480 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:02:12,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:02:12,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 06:02:12,705 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1447677448, now seen corresponding path program 1 times [2021-11-20 06:02:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54396686] [2021-11-20 06:02:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:12,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:02:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:02:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:02:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:02:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:02:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:02:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:02:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:02:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:02:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 06:02:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:02:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:02:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:02:13,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:13,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54396686] [2021-11-20 06:02:13,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54396686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:02:13,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540706777] [2021-11-20 06:02:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:13,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:02:13,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:02:13,352 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:02:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:02:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:02:13,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:02:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:02:13,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:02:13,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540706777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:13,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:02:13,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 21 [2021-11-20 06:02:13,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179440197] [2021-11-20 06:02:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:13,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:02:13,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:02:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:02:13,954 INFO L87 Difference]: Start difference. First operand 2761 states and 4536 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:02:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:14,455 INFO L93 Difference]: Finished difference Result 5531 states and 9180 transitions. [2021-11-20 06:02:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:02:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 168 [2021-11-20 06:02:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:14,475 INFO L225 Difference]: With dead ends: 5531 [2021-11-20 06:02:14,475 INFO L226 Difference]: Without dead ends: 3165 [2021-11-20 06:02:14,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:02:14,488 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 390 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 4399 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:14,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 4399 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:02:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-11-20 06:02:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 3165. [2021-11-20 06:02:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 2514 states have (on average 1.5958631662688942) internal successors, (4012), 2582 states have internal predecessors, (4012), 504 states have call successors, (504), 125 states have call predecessors, (504), 146 states have return successors, (656), 517 states have call predecessors, (656), 499 states have call successors, (656) [2021-11-20 06:02:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 5172 transitions. [2021-11-20 06:02:14,934 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 5172 transitions. Word has length 168 [2021-11-20 06:02:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:14,934 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 5172 transitions. [2021-11-20 06:02:14,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 4 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-20 06:02:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 5172 transitions. [2021-11-20 06:02:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 06:02:14,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:14,939 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:02:14,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-20 06:02:15,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 06:02:15,153 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -735750649, now seen corresponding path program 1 times [2021-11-20 06:02:15,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:15,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265276037] [2021-11-20 06:02:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:15,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:02:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:02:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:02:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:02:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:02:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:02:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:02:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-20 06:02:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-20 06:02:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:02:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:02:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 06:02:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:02:15,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:15,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265276037] [2021-11-20 06:02:15,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265276037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:15,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:15,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-20 06:02:15,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123531890] [2021-11-20 06:02:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:15,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:02:15,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:02:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:02:15,701 INFO L87 Difference]: Start difference. First operand 3165 states and 5172 transitions. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 10 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:02:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:02:41,518 INFO L93 Difference]: Finished difference Result 12224 states and 21494 transitions. [2021-11-20 06:02:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 06:02:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 10 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 169 [2021-11-20 06:02:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:02:41,578 INFO L225 Difference]: With dead ends: 12224 [2021-11-20 06:02:41,578 INFO L226 Difference]: Without dead ends: 9170 [2021-11-20 06:02:41,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=634, Invalid=3026, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:02:41,602 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 6896 mSDsluCounter, 4914 mSDsCounter, 0 mSdLazyCounter, 13317 mSolverCounterSat, 2528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6960 SdHoareTripleChecker+Valid, 6020 SdHoareTripleChecker+Invalid, 15845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2528 IncrementalHoareTripleChecker+Valid, 13317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:02:41,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6960 Valid, 6020 Invalid, 15845 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2528 Valid, 13317 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2021-11-20 06:02:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-11-20 06:02:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7363. [2021-11-20 06:02:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7363 states, 5864 states have (on average 1.5731582537517053) internal successors, (9225), 6020 states have internal predecessors, (9225), 1112 states have call successors, (1112), 312 states have call predecessors, (1112), 386 states have return successors, (1875), 1150 states have call predecessors, (1875), 1107 states have call successors, (1875) [2021-11-20 06:02:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7363 states to 7363 states and 12212 transitions. [2021-11-20 06:02:42,830 INFO L78 Accepts]: Start accepts. Automaton has 7363 states and 12212 transitions. Word has length 169 [2021-11-20 06:02:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:02:42,831 INFO L470 AbstractCegarLoop]: Abstraction has 7363 states and 12212 transitions. [2021-11-20 06:02:42,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 10 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-20 06:02:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7363 states and 12212 transitions. [2021-11-20 06:02:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-20 06:02:42,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:02:42,837 INFO L514 BasicCegarLoop]: trace histogram [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 06:02:42,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-20 06:02:42,838 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:02:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:02:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1508710935, now seen corresponding path program 1 times [2021-11-20 06:02:42,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:02:42,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115067566] [2021-11-20 06:02:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:02:42,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:02:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:02:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:02:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:02:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:02:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:02:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:02:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:02:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:02:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:02:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-20 06:02:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:02:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:02:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:02:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:02:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:02:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:02:43,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:02:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115067566] [2021-11-20 06:02:43,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115067566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:02:43,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:02:43,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-20 06:02:43,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800289531] [2021-11-20 06:02:43,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:02:43,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:02:43,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:02:43,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:02:43,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:02:43,866 INFO L87 Difference]: Start difference. First operand 7363 states and 12212 transitions. Second operand has 24 states, 22 states have (on average 5.636363636363637) internal successors, (124), 18 states have internal predecessors, (124), 9 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:05:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:36,006 INFO L93 Difference]: Finished difference Result 72979 states and 152691 transitions. [2021-11-20 06:05:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 373 states. [2021-11-20 06:05:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 5.636363636363637) internal successors, (124), 18 states have internal predecessors, (124), 9 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 175 [2021-11-20 06:05:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:36,715 INFO L225 Difference]: With dead ends: 72979 [2021-11-20 06:05:36,715 INFO L226 Difference]: Without dead ends: 65651 [2021-11-20 06:05:37,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67978 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=12770, Invalid=136612, Unknown=0, NotChecked=0, Total=149382 [2021-11-20 06:05:37,061 INFO L933 BasicCegarLoop]: 2510 mSDtfsCounter, 24165 mSDsluCounter, 18191 mSDsCounter, 0 mSdLazyCounter, 90400 mSolverCounterSat, 25089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24241 SdHoareTripleChecker+Valid, 20701 SdHoareTripleChecker+Invalid, 115489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.8s SdHoareTripleChecker+Time, 25089 IncrementalHoareTripleChecker+Valid, 90400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:37,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24241 Valid, 20701 Invalid, 115489 Unknown, 0 Unchecked, 0.8s Time], IncrementalHoareTripleChecker [25089 Valid, 90400 Invalid, 0 Unknown, 0 Unchecked, 101.4s Time] [2021-11-20 06:05:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65651 states. [2021-11-20 06:05:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65651 to 37488. [2021-11-20 06:05:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37488 states, 28430 states have (on average 1.5394301793879706) internal successors, (43766), 29637 states have internal predecessors, (43766), 7054 states have call successors, (7054), 1638 states have call predecessors, (7054), 2003 states have return successors, (12950), 7175 states have call predecessors, (12950), 7049 states have call successors, (12950) [2021-11-20 06:05:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37488 states to 37488 states and 63770 transitions. [2021-11-20 06:05:45,511 INFO L78 Accepts]: Start accepts. Automaton has 37488 states and 63770 transitions. Word has length 175 [2021-11-20 06:05:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:45,511 INFO L470 AbstractCegarLoop]: Abstraction has 37488 states and 63770 transitions. [2021-11-20 06:05:45,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 5.636363636363637) internal successors, (124), 18 states have internal predecessors, (124), 9 states have call successors, (19), 5 states have call predecessors, (19), 8 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:05:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 37488 states and 63770 transitions. [2021-11-20 06:05:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 06:05:45,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:45,521 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:05:45,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 06:05:45,521 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:45,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 216509133, now seen corresponding path program 1 times [2021-11-20 06:05:45,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:45,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855066065] [2021-11-20 06:05:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:45,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:05:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:05:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:05:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:05:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:05:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:05:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:05:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:05:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:05:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:05:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:05:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-20 06:05:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:05:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:05:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:05:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 06:05:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:05:45,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855066065] [2021-11-20 06:05:45,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855066065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140855984] [2021-11-20 06:05:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:45,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:45,962 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:45,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:05:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:05:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:05:46,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:46,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140855984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:46,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:46,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-20 06:05:46,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98992706] [2021-11-20 06:05:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:46,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:46,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:05:46,603 INFO L87 Difference]: Start difference. First operand 37488 states and 63770 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 06:05:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:53,108 INFO L93 Difference]: Finished difference Result 75593 states and 132404 transitions. [2021-11-20 06:05:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:05:53,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 182 [2021-11-20 06:05:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:53,605 INFO L225 Difference]: With dead ends: 75593 [2021-11-20 06:05:53,605 INFO L226 Difference]: Without dead ends: 38192 [2021-11-20 06:05:53,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:05:53,829 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 22 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2635 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:53,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2635 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:05:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38192 states. [2021-11-20 06:06:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38192 to 38192. [2021-11-20 06:06:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38192 states, 29046 states have (on average 1.5425187633409074) internal successors, (44804), 30253 states have internal predecessors, (44804), 7054 states have call successors, (7054), 1726 states have call predecessors, (7054), 2091 states have return successors, (13002), 7175 states have call predecessors, (13002), 7049 states have call successors, (13002) [2021-11-20 06:06:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38192 states to 38192 states and 64860 transitions. [2021-11-20 06:06:00,624 INFO L78 Accepts]: Start accepts. Automaton has 38192 states and 64860 transitions. Word has length 182 [2021-11-20 06:06:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:06:00,625 INFO L470 AbstractCegarLoop]: Abstraction has 38192 states and 64860 transitions. [2021-11-20 06:06:00,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 06:06:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 38192 states and 64860 transitions. [2021-11-20 06:06:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-20 06:06:00,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:06:00,633 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:06:00,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:06:00,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45c93ad8-2690-4aa2-98d7-68621b75e225/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:06:00,845 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:06:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:06:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1212937925, now seen corresponding path program 1 times [2021-11-20 06:06:00,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:06:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180685699] [2021-11-20 06:06:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:06:00,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:06:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:06:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:06:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-20 06:06:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-20 06:06:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:06:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:06:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:06:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:06:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:06:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:06:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:06:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-20 06:06:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:06:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:06:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-20 06:06:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:06:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:06:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:06:01,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:06:01,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180685699] [2021-11-20 06:06:01,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180685699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:06:01,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:06:01,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:06:01,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945365836] [2021-11-20 06:06:01,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:06:01,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:06:01,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:06:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:06:01,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:06:01,383 INFO L87 Difference]: Start difference. First operand 38192 states and 64860 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 8 states have internal predecessors, (127), 4 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 3 states have call successors, (19)