./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa --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 c8f2c8bbca1604520c033b56ef7dc20cb52b8816f61a97092b9d646e833034c4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:44:58,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:44:58,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:44:58,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:44:58,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:44:58,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:44:58,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:44:58,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:44:58,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:44:58,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:44:58,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:44:58,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:44:58,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:44:58,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:44:58,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:44:58,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:44:58,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:44:58,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:44:58,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:44:58,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:44:58,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:44:58,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:44:58,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:44:58,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:44:58,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:44:58,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:44:58,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:44:58,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:44:58,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:44:58,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:44:58,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:44:58,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:44:58,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:44:58,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:44:58,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:44:58,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:44:58,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:44:58,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:44:58,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:44:58,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:44:58,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:44:58,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:44:58,214 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:44:58,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:44:58,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:44:58,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:44:58,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:44:58,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:44:58,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:44:58,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:44:58,216 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:44:58,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:44:58,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:44:58,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:44:58,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:44:58,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:44:58,219 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:44:58,220 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:44:58,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:44:58,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:44:58,220 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_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f2c8bbca1604520c033b56ef7dc20cb52b8816f61a97092b9d646e833034c4 [2021-12-07 01:44:58,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:44:58,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:44:58,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:44:58,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:44:58,413 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:44:58,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem19_label00.c [2021-12-07 01:44:58,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/data/abb21813a/7a76730921904791991964cad9096b28/FLAG2826a2ee1 [2021-12-07 01:44:59,081 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:44:59,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/sv-benchmarks/c/eca-rers2012/Problem19_label00.c [2021-12-07 01:44:59,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/data/abb21813a/7a76730921904791991964cad9096b28/FLAG2826a2ee1 [2021-12-07 01:44:59,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/data/abb21813a/7a76730921904791991964cad9096b28 [2021-12-07 01:44:59,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:44:59,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:44:59,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:44:59,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:44:59,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:44:59,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:59" (1/1) ... [2021-12-07 01:44:59,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311a7f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:59, skipping insertion in model container [2021-12-07 01:44:59,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:59" (1/1) ... [2021-12-07 01:44:59,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:44:59,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:44:59,996 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_381d32f1-0d92-4b63-bf10-d95eee1cba9a/sv-benchmarks/c/eca-rers2012/Problem19_label00.c[5401,5414] [2021-12-07 01:45:01,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:45:01,015 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:45:01,031 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_381d32f1-0d92-4b63-bf10-d95eee1cba9a/sv-benchmarks/c/eca-rers2012/Problem19_label00.c[5401,5414] [2021-12-07 01:45:01,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:45:01,769 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:45:01,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01 WrapperNode [2021-12-07 01:45:01,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:45:01,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:45:01,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:45:01,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:45:01,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:01,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,435 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-07 01:45:02,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:45:02,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:45:02,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:45:02,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:45:02,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:45:02,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:45:02,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:45:02,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:45:02,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (1/1) ... [2021-12-07 01:45:02,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:45:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:45:03,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:45:03,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:45:03,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:45:03,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:45:03,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:45:03,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:45:03,088 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:45:03,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:45:08,704 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:45:08,727 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:45:08,727 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 01:45:08,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:45:08 BoogieIcfgContainer [2021-12-07 01:45:08,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:45:08,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:45:08,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:45:08,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:45:08,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:44:59" (1/3) ... [2021-12-07 01:45:08,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8aca23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:45:08, skipping insertion in model container [2021-12-07 01:45:08,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:45:01" (2/3) ... [2021-12-07 01:45:08,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a8aca23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:45:08, skipping insertion in model container [2021-12-07 01:45:08,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:45:08" (3/3) ... [2021-12-07 01:45:08,736 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label00.c [2021-12-07 01:45:08,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:45:08,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:45:08,781 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:45:08,787 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 [2021-12-07 01:45:08,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:45:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 01:45:08,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:08,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:08,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2102454322, now seen corresponding path program 1 times [2021-12-07 01:45:08,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492232504] [2021-12-07 01:45:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:08,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:45:09,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:09,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492232504] [2021-12-07 01:45:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492232504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:09,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:09,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:45:09,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35922320] [2021-12-07 01:45:09,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:09,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:09,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:09,052 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:14,636 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-12-07 01:45:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-07 01:45:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:14,664 INFO L225 Difference]: With dead ends: 4919 [2021-12-07 01:45:14,664 INFO L226 Difference]: Without dead ends: 3107 [2021-12-07 01:45:14,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:14,672 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 1513 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:14,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-07 01:45:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-12-07 01:45:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-12-07 01:45:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-12-07 01:45:14,789 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 40 [2021-12-07 01:45:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:14,790 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-12-07 01:45:14,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-12-07 01:45:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:45:14,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:14,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:14,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:45:14,794 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash 480534858, now seen corresponding path program 1 times [2021-12-07 01:45:14,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946176649] [2021-12-07 01:45:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:14,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:45:14,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946176649] [2021-12-07 01:45:14,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946176649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:14,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:14,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:45:14,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122567532] [2021-12-07 01:45:14,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:14,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:14,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:14,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:14,919 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:25,747 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-12-07 01:45:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:45:25,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-07 01:45:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:25,777 INFO L225 Difference]: With dead ends: 10391 [2021-12-07 01:45:25,777 INFO L226 Difference]: Without dead ends: 7287 [2021-12-07 01:45:25,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:25,782 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 4207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11122 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 12528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:25,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 2104 Invalid, 12528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 11122 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2021-12-07 01:45:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-07 01:45:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-12-07 01:45:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2021-12-07 01:45:25,915 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 109 [2021-12-07 01:45:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:25,916 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2021-12-07 01:45:25,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2021-12-07 01:45:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-07 01:45:25,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:25,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:25,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:45:25,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -828431573, now seen corresponding path program 1 times [2021-12-07 01:45:25,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121027016] [2021-12-07 01:45:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:25,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:45:26,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:26,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121027016] [2021-12-07 01:45:26,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121027016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:26,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:26,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:45:26,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306529301] [2021-12-07 01:45:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:26,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:26,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:26,130 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:32,821 INFO L93 Difference]: Finished difference Result 13136 states and 20668 transitions. [2021-12-07 01:45:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:45:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-12-07 01:45:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:32,848 INFO L225 Difference]: With dead ends: 13136 [2021-12-07 01:45:32,849 INFO L226 Difference]: Without dead ends: 7236 [2021-12-07 01:45:32,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:32,855 INFO L933 BasicCegarLoop]: 1767 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 7327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:32,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2109 Invalid, 7327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7319 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-12-07 01:45:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2021-12-07 01:45:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7236. [2021-12-07 01:45:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5202487906012438) internal successors, (10999), 7235 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10999 transitions. [2021-12-07 01:45:32,990 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 10999 transitions. Word has length 275 [2021-12-07 01:45:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:32,990 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 10999 transitions. [2021-12-07 01:45:32,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 10999 transitions. [2021-12-07 01:45:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-12-07 01:45:33,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:33,003 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:33,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:45:33,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2120845183, now seen corresponding path program 1 times [2021-12-07 01:45:33,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:33,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556446235] [2021-12-07 01:45:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:33,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-07 01:45:33,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:33,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556446235] [2021-12-07 01:45:33,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556446235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:33,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:33,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:45:33,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783199844] [2021-12-07 01:45:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:33,273 INFO L87 Difference]: Start difference. First operand 7236 states and 10999 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:37,774 INFO L93 Difference]: Finished difference Result 15842 states and 24472 transitions. [2021-12-07 01:45:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:37,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 592 [2021-12-07 01:45:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:37,810 INFO L225 Difference]: With dead ends: 15842 [2021-12-07 01:45:37,810 INFO L226 Difference]: Without dead ends: 9973 [2021-12-07 01:45:37,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:37,815 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:37,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-07 01:45:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-12-07 01:45:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9969. [2021-12-07 01:45:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.3901484751203852) internal successors, (13857), 9968 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 13857 transitions. [2021-12-07 01:45:37,955 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 13857 transitions. Word has length 592 [2021-12-07 01:45:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:37,956 INFO L470 AbstractCegarLoop]: Abstraction has 9969 states and 13857 transitions. [2021-12-07 01:45:37,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 13857 transitions. [2021-12-07 01:45:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-12-07 01:45:37,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:37,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:45:37,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash -260401908, now seen corresponding path program 1 times [2021-12-07 01:45:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930582225] [2021-12-07 01:45:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:37,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-07 01:45:38,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930582225] [2021-12-07 01:45:38,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930582225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:38,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:38,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:45:38,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820841004] [2021-12-07 01:45:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:38,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:38,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:38,187 INFO L87 Difference]: Start difference. First operand 9969 states and 13857 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:44,600 INFO L93 Difference]: Finished difference Result 26933 states and 38507 transitions. [2021-12-07 01:45:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 595 [2021-12-07 01:45:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:44,623 INFO L225 Difference]: With dead ends: 26933 [2021-12-07 01:45:44,623 INFO L226 Difference]: Without dead ends: 18331 [2021-12-07 01:45:44,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:44,630 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:44,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 982 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-07 01:45:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18331 states. [2021-12-07 01:45:44,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18331 to 18329. [2021-12-07 01:45:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 18328 states have (on average 1.378601047577477) internal successors, (25267), 18328 states have internal predecessors, (25267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 25267 transitions. [2021-12-07 01:45:44,826 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 25267 transitions. Word has length 595 [2021-12-07 01:45:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:44,827 INFO L470 AbstractCegarLoop]: Abstraction has 18329 states and 25267 transitions. [2021-12-07 01:45:44,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 25267 transitions. [2021-12-07 01:45:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2021-12-07 01:45:44,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:44,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:44,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:45:44,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1298652613, now seen corresponding path program 1 times [2021-12-07 01:45:44,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:44,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943178670] [2021-12-07 01:45:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:44,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 75 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:45:45,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943178670] [2021-12-07 01:45:45,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943178670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:45:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107362774] [2021-12-07 01:45:45,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:45,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:45:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:45:45,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:45:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:45:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:45:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 01:45:45,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107362774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:45,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:45:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-07 01:45:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128210142] [2021-12-07 01:45:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:45,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:45,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:45:45,844 INFO L87 Difference]: Start difference. First operand 18329 states and 25267 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:51,582 INFO L93 Difference]: Finished difference Result 51713 states and 72347 transitions. [2021-12-07 01:45:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 609 [2021-12-07 01:45:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:51,618 INFO L225 Difference]: With dead ends: 51713 [2021-12-07 01:45:51,618 INFO L226 Difference]: Without dead ends: 34751 [2021-12-07 01:45:51,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:45:51,633 INFO L933 BasicCegarLoop]: 1958 mSDtfsCounter, 1681 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4894 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 4894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:51,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 2065 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 4894 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-07 01:45:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34751 states. [2021-12-07 01:45:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34751 to 34728. [2021-12-07 01:45:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34728 states, 34727 states have (on average 1.3551415325251246) internal successors, (47060), 34727 states have internal predecessors, (47060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34728 states to 34728 states and 47060 transitions. [2021-12-07 01:45:52,008 INFO L78 Accepts]: Start accepts. Automaton has 34728 states and 47060 transitions. Word has length 609 [2021-12-07 01:45:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:52,009 INFO L470 AbstractCegarLoop]: Abstraction has 34728 states and 47060 transitions. [2021-12-07 01:45:52,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34728 states and 47060 transitions. [2021-12-07 01:45:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2021-12-07 01:45:52,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:52,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:52,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:45:52,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -254938537, now seen corresponding path program 1 times [2021-12-07 01:45:52,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:52,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493578872] [2021-12-07 01:45:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:52,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-07 01:45:52,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:52,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493578872] [2021-12-07 01:45:52,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493578872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:52,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:52,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:45:52,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521915961] [2021-12-07 01:45:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:52,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:52,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:52,422 INFO L87 Difference]: Start difference. First operand 34728 states and 47060 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:57,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:57,817 INFO L93 Difference]: Finished difference Result 98323 states and 134131 transitions. [2021-12-07 01:45:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 616 [2021-12-07 01:45:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:57,890 INFO L225 Difference]: With dead ends: 98323 [2021-12-07 01:45:57,890 INFO L226 Difference]: Without dead ends: 64962 [2021-12-07 01:45:57,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:57,919 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 1356 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4206 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1695 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 4206 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-07 01:45:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64962 states. [2021-12-07 01:45:58,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64962 to 62214. [2021-12-07 01:45:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62214 states, 62213 states have (on average 1.2403516949833635) internal successors, (77166), 62213 states have internal predecessors, (77166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62214 states to 62214 states and 77166 transitions. [2021-12-07 01:45:58,538 INFO L78 Accepts]: Start accepts. Automaton has 62214 states and 77166 transitions. Word has length 616 [2021-12-07 01:45:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:58,539 INFO L470 AbstractCegarLoop]: Abstraction has 62214 states and 77166 transitions. [2021-12-07 01:45:58,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:45:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 62214 states and 77166 transitions. [2021-12-07 01:45:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-12-07 01:45:58,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:58,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:58,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-07 01:45:58,544 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:45:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash -782653544, now seen corresponding path program 1 times [2021-12-07 01:45:58,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:45:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377344162] [2021-12-07 01:45:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:58,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:45:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 96 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-07 01:45:58,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:45:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377344162] [2021-12-07 01:45:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377344162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:45:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731116127] [2021-12-07 01:45:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:58,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:45:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:45:58,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:45:58,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:45:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:45:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-07 01:45:59,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:59,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731116127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:59,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:45:59,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:45:59,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626762785] [2021-12-07 01:45:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:59,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:45:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:59,332 INFO L87 Difference]: Start difference. First operand 62214 states and 77166 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:04,977 INFO L93 Difference]: Finished difference Result 123167 states and 153151 transitions. [2021-12-07 01:46:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 631 [2021-12-07 01:46:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:05,039 INFO L225 Difference]: With dead ends: 123167 [2021-12-07 01:46:05,039 INFO L226 Difference]: Without dead ends: 62320 [2021-12-07 01:46:05,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:46:05,068 INFO L933 BasicCegarLoop]: 2770 mSDtfsCounter, 1425 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4069 mSolverCounterSat, 1722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1722 IncrementalHoareTripleChecker+Valid, 4069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:05,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 2942 Invalid, 5791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1722 Valid, 4069 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-07 01:46:05,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62320 states. [2021-12-07 01:46:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62320 to 59507. [2021-12-07 01:46:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59507 states, 59506 states have (on average 1.1772090209390649) internal successors, (70051), 59506 states have internal predecessors, (70051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59507 states to 59507 states and 70051 transitions. [2021-12-07 01:46:05,661 INFO L78 Accepts]: Start accepts. Automaton has 59507 states and 70051 transitions. Word has length 631 [2021-12-07 01:46:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:05,662 INFO L470 AbstractCegarLoop]: Abstraction has 59507 states and 70051 transitions. [2021-12-07 01:46:05,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 59507 states and 70051 transitions. [2021-12-07 01:46:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-12-07 01:46:05,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:05,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:05,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:46:05,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:05,870 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1377023951, now seen corresponding path program 1 times [2021-12-07 01:46:05,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376165997] [2021-12-07 01:46:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:05,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 75 proven. 37 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-07 01:46:06,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376165997] [2021-12-07 01:46:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376165997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693370277] [2021-12-07 01:46:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:06,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:06,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:06,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:46:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:46:06,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-07 01:46:06,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:46:06,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693370277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:06,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:46:06,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 01:46:06,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128368153] [2021-12-07 01:46:06,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:06,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:06,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:46:06,850 INFO L87 Difference]: Start difference. First operand 59507 states and 70051 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:12,373 INFO L93 Difference]: Finished difference Result 138144 states and 164585 transitions. [2021-12-07 01:46:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:12,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 737 [2021-12-07 01:46:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:12,443 INFO L225 Difference]: With dead ends: 138144 [2021-12-07 01:46:12,443 INFO L226 Difference]: Without dead ends: 80004 [2021-12-07 01:46:12,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 736 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:46:12,469 INFO L933 BasicCegarLoop]: 1257 mSDtfsCounter, 1565 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 5828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:12,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 1379 Invalid, 5828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-07 01:46:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80004 states. [2021-12-07 01:46:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80004 to 75896. [2021-12-07 01:46:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75896 states, 75895 states have (on average 1.1777587456354173) internal successors, (89386), 75895 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75896 states to 75896 states and 89386 transitions. [2021-12-07 01:46:13,186 INFO L78 Accepts]: Start accepts. Automaton has 75896 states and 89386 transitions. Word has length 737 [2021-12-07 01:46:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:13,187 INFO L470 AbstractCegarLoop]: Abstraction has 75896 states and 89386 transitions. [2021-12-07 01:46:13,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 75896 states and 89386 transitions. [2021-12-07 01:46:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2021-12-07 01:46:13,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:13,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:13,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:46:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:13,396 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2053230167, now seen corresponding path program 1 times [2021-12-07 01:46:13,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262717055] [2021-12-07 01:46:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:13,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-07 01:46:13,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262717055] [2021-12-07 01:46:13,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262717055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:13,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:46:13,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:46:13,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11862479] [2021-12-07 01:46:13,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:13,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:13,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:13,722 INFO L87 Difference]: Start difference. First operand 75896 states and 89386 transitions. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:19,926 INFO L93 Difference]: Finished difference Result 194153 states and 232086 transitions. [2021-12-07 01:46:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 833 [2021-12-07 01:46:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:20,039 INFO L225 Difference]: With dead ends: 194153 [2021-12-07 01:46:20,039 INFO L226 Difference]: Without dead ends: 119624 [2021-12-07 01:46:20,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:20,066 INFO L933 BasicCegarLoop]: 2436 mSDtfsCounter, 1549 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5041 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 2657 SdHoareTripleChecker+Invalid, 5914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 5041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:20,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 2657 Invalid, 5914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 5041 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-07 01:46:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119624 states. [2021-12-07 01:46:21,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119624 to 119611. [2021-12-07 01:46:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119611 states, 119610 states have (on average 1.1831870244962797) internal successors, (141521), 119610 states have internal predecessors, (141521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119611 states to 119611 states and 141521 transitions. [2021-12-07 01:46:21,346 INFO L78 Accepts]: Start accepts. Automaton has 119611 states and 141521 transitions. Word has length 833 [2021-12-07 01:46:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:21,347 INFO L470 AbstractCegarLoop]: Abstraction has 119611 states and 141521 transitions. [2021-12-07 01:46:21,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 119611 states and 141521 transitions. [2021-12-07 01:46:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-12-07 01:46:21,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:21,360 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:21,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-07 01:46:21,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash 917244705, now seen corresponding path program 1 times [2021-12-07 01:46:21,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502776835] [2021-12-07 01:46:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:21,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-07 01:46:21,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:21,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502776835] [2021-12-07 01:46:21,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502776835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:21,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:46:21,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:46:21,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842905063] [2021-12-07 01:46:21,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:21,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:21,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:21,722 INFO L87 Difference]: Start difference. First operand 119611 states and 141521 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:27,672 INFO L93 Difference]: Finished difference Result 269257 states and 322054 transitions. [2021-12-07 01:46:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:27,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 900 [2021-12-07 01:46:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:27,831 INFO L225 Difference]: With dead ends: 269257 [2021-12-07 01:46:27,831 INFO L226 Difference]: Without dead ends: 146916 [2021-12-07 01:46:27,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:27,874 INFO L933 BasicCegarLoop]: 3057 mSDtfsCounter, 1399 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 4454 mSolverCounterSat, 1002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 4454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:27,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 3243 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 4454 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-07 01:46:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146916 states. [2021-12-07 01:46:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146916 to 146903. [2021-12-07 01:46:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146903 states, 146902 states have (on average 1.162673074566718) internal successors, (170799), 146902 states have internal predecessors, (170799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146903 states to 146903 states and 170799 transitions. [2021-12-07 01:46:29,396 INFO L78 Accepts]: Start accepts. Automaton has 146903 states and 170799 transitions. Word has length 900 [2021-12-07 01:46:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:29,397 INFO L470 AbstractCegarLoop]: Abstraction has 146903 states and 170799 transitions. [2021-12-07 01:46:29,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 146903 states and 170799 transitions. [2021-12-07 01:46:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2021-12-07 01:46:29,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:29,414 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:29,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 01:46:29,414 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:29,415 INFO L85 PathProgramCache]: Analyzing trace with hash 39923727, now seen corresponding path program 1 times [2021-12-07 01:46:29,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375657187] [2021-12-07 01:46:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:29,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-07 01:46:29,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375657187] [2021-12-07 01:46:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375657187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:29,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:46:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:46:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375574867] [2021-12-07 01:46:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:29,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:29,879 INFO L87 Difference]: Start difference. First operand 146903 states and 170799 transitions. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:36,485 INFO L93 Difference]: Finished difference Result 367630 states and 431971 transitions. [2021-12-07 01:46:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1102 [2021-12-07 01:46:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:36,707 INFO L225 Difference]: With dead ends: 367630 [2021-12-07 01:46:36,708 INFO L226 Difference]: Without dead ends: 222094 [2021-12-07 01:46:36,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:36,749 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 1515 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 2198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 6445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2198 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:36,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 726 Invalid, 6445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2198 Valid, 4247 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-07 01:46:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222094 states. [2021-12-07 01:46:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222094 to 204224. [2021-12-07 01:46:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204224 states, 204223 states have (on average 1.184817576864506) internal successors, (241967), 204223 states have internal predecessors, (241967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204224 states to 204224 states and 241967 transitions. [2021-12-07 01:46:38,956 INFO L78 Accepts]: Start accepts. Automaton has 204224 states and 241967 transitions. Word has length 1102 [2021-12-07 01:46:38,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:38,956 INFO L470 AbstractCegarLoop]: Abstraction has 204224 states and 241967 transitions. [2021-12-07 01:46:38,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 3 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 204224 states and 241967 transitions. [2021-12-07 01:46:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2021-12-07 01:46:38,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:38,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:38,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 01:46:38,979 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1990893022, now seen corresponding path program 1 times [2021-12-07 01:46:38,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247134733] [2021-12-07 01:46:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:38,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 76 proven. 37 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-12-07 01:46:39,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:39,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247134733] [2021-12-07 01:46:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247134733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:46:39,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043901048] [2021-12-07 01:46:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:39,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:46:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:46:39,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:46:39,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:46:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:46:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:46:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-12-07 01:46:40,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:46:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043901048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:40,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:46:40,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-07 01:46:40,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616318948] [2021-12-07 01:46:40,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:40,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:40,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:40,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:46:40,739 INFO L87 Difference]: Start difference. First operand 204224 states and 241967 transitions. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:47,947 INFO L93 Difference]: Finished difference Result 424948 states and 502230 transitions. [2021-12-07 01:46:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1132 [2021-12-07 01:46:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:48,277 INFO L225 Difference]: With dead ends: 424948 [2021-12-07 01:46:48,278 INFO L226 Difference]: Without dead ends: 222091 [2021-12-07 01:46:48,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:46:48,322 INFO L933 BasicCegarLoop]: 3055 mSDtfsCounter, 1439 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4989 mSolverCounterSat, 882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 5871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 4989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:48,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 3227 Invalid, 5871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 4989 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-07 01:46:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222091 states. [2021-12-07 01:46:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222091 to 220618. [2021-12-07 01:46:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220618 states, 220617 states have (on average 1.1380356001577394) internal successors, (251070), 220617 states have internal predecessors, (251070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220618 states to 220618 states and 251070 transitions. [2021-12-07 01:46:50,505 INFO L78 Accepts]: Start accepts. Automaton has 220618 states and 251070 transitions. Word has length 1132 [2021-12-07 01:46:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:46:50,506 INFO L470 AbstractCegarLoop]: Abstraction has 220618 states and 251070 transitions. [2021-12-07 01:46:50,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 220618 states and 251070 transitions. [2021-12-07 01:46:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1140 [2021-12-07 01:46:50,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:46:50,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:46:50,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:46:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 01:46:50,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:46:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:46:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1379037425, now seen corresponding path program 1 times [2021-12-07 01:46:50,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:46:50,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521079313] [2021-12-07 01:46:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:46:50,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:46:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:46:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1039 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-07 01:46:51,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:46:51,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521079313] [2021-12-07 01:46:51,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521079313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:46:51,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:46:51,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:46:51,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132917567] [2021-12-07 01:46:51,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:46:51,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:46:51,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:46:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:46:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:51,325 INFO L87 Difference]: Start difference. First operand 220618 states and 251070 transitions. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:46:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:46:58,865 INFO L93 Difference]: Finished difference Result 512326 states and 588118 transitions. [2021-12-07 01:46:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:46:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1139 [2021-12-07 01:46:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:46:59,185 INFO L225 Difference]: With dead ends: 512326 [2021-12-07 01:46:59,185 INFO L226 Difference]: Without dead ends: 293075 [2021-12-07 01:46:59,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:46:59,376 INFO L933 BasicCegarLoop]: 2956 mSDtfsCounter, 1170 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 5735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:46:59,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 3118 Invalid, 5735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [825 Valid, 4910 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-07 01:46:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293075 states. [2021-12-07 01:47:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293075 to 292979. [2021-12-07 01:47:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292979 states, 292978 states have (on average 1.1250093863703077) internal successors, (329603), 292978 states have internal predecessors, (329603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292979 states to 292979 states and 329603 transitions. [2021-12-07 01:47:02,276 INFO L78 Accepts]: Start accepts. Automaton has 292979 states and 329603 transitions. Word has length 1139 [2021-12-07 01:47:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:02,277 INFO L470 AbstractCegarLoop]: Abstraction has 292979 states and 329603 transitions. [2021-12-07 01:47:02,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 292979 states and 329603 transitions. [2021-12-07 01:47:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1386 [2021-12-07 01:47:02,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:02,321 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:02,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 01:47:02,321 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1096247325, now seen corresponding path program 1 times [2021-12-07 01:47:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:02,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760469523] [2021-12-07 01:47:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:02,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 1547 proven. 0 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2021-12-07 01:47:02,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:02,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760469523] [2021-12-07 01:47:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760469523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:47:02,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:47:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:47:02,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658336575] [2021-12-07 01:47:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:47:02,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:47:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:47:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:47:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:47:02,892 INFO L87 Difference]: Start difference. First operand 292979 states and 329603 transitions. Second operand has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:47:10,249 INFO L93 Difference]: Finished difference Result 695192 states and 784847 transitions. [2021-12-07 01:47:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:47:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1385 [2021-12-07 01:47:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:47:10,715 INFO L225 Difference]: With dead ends: 695192 [2021-12-07 01:47:10,715 INFO L226 Difference]: Without dead ends: 403580 [2021-12-07 01:47:10,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:47:10,898 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 1342 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3984 mSolverCounterSat, 1702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 5686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1702 IncrementalHoareTripleChecker+Valid, 3984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:47:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1342 Valid, 1601 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1702 Valid, 3984 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-07 01:47:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403580 states. [2021-12-07 01:47:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403580 to 403542. [2021-12-07 01:47:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403542 states, 403541 states have (on average 1.1016154492356416) internal successors, (444547), 403541 states have internal predecessors, (444547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403542 states to 403542 states and 444547 transitions. [2021-12-07 01:47:15,188 INFO L78 Accepts]: Start accepts. Automaton has 403542 states and 444547 transitions. Word has length 1385 [2021-12-07 01:47:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 403542 states and 444547 transitions. [2021-12-07 01:47:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 403542 states and 444547 transitions. [2021-12-07 01:47:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1436 [2021-12-07 01:47:15,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:15,238 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-07 01:47:15,239 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash 518025855, now seen corresponding path program 1 times [2021-12-07 01:47:15,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244052157] [2021-12-07 01:47:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:15,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 1063 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-07 01:47:15,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:15,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244052157] [2021-12-07 01:47:15,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244052157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:47:15,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:47:15,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:47:15,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884889273] [2021-12-07 01:47:15,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:47:15,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:47:15,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:47:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:47:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:47:15,688 INFO L87 Difference]: Start difference. First operand 403542 states and 444547 transitions. Second operand has 4 states, 4 states have (on average 297.5) internal successors, (1190), 4 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:47:28,311 INFO L93 Difference]: Finished difference Result 1081633 states and 1194643 transitions. [2021-12-07 01:47:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:47:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 297.5) internal successors, (1190), 4 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1435 [2021-12-07 01:47:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:47:29,087 INFO L225 Difference]: With dead ends: 1081633 [2021-12-07 01:47:29,088 INFO L226 Difference]: Without dead ends: 679458 [2021-12-07 01:47:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:47:29,354 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 3395 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 8463 mSolverCounterSat, 2876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 11339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2876 IncrementalHoareTripleChecker+Valid, 8463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:47:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 1125 Invalid, 11339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2876 Valid, 8463 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-12-07 01:47:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679458 states. [2021-12-07 01:47:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679458 to 653377. [2021-12-07 01:47:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653377 states, 653376 states have (on average 1.0974630228229993) internal successors, (717056), 653376 states have internal predecessors, (717056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653377 states to 653377 states and 717056 transitions. [2021-12-07 01:47:36,552 INFO L78 Accepts]: Start accepts. Automaton has 653377 states and 717056 transitions. Word has length 1435 [2021-12-07 01:47:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:36,553 INFO L470 AbstractCegarLoop]: Abstraction has 653377 states and 717056 transitions. [2021-12-07 01:47:36,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 297.5) internal successors, (1190), 4 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 653377 states and 717056 transitions. [2021-12-07 01:47:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1445 [2021-12-07 01:47:36,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:36,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:36,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 01:47:36,775 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash -726190216, now seen corresponding path program 1 times [2021-12-07 01:47:36,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:36,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132734126] [2021-12-07 01:47:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:36,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-07 01:47:37,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132734126] [2021-12-07 01:47:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132734126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:47:37,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:47:37,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:47:37,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541894133] [2021-12-07 01:47:37,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:47:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:47:37,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:47:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:47:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:47:37,213 INFO L87 Difference]: Start difference. First operand 653377 states and 717056 transitions. Second operand has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:47:45,157 INFO L93 Difference]: Finished difference Result 1312214 states and 1439649 transitions. [2021-12-07 01:47:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:47:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1444 [2021-12-07 01:47:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:47:45,996 INFO L225 Difference]: With dead ends: 1312214 [2021-12-07 01:47:45,996 INFO L226 Difference]: Without dead ends: 657473 [2021-12-07 01:47:46,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:47:46,199 INFO L933 BasicCegarLoop]: 2858 mSDtfsCounter, 995 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 1473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 3033 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1473 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:47:46,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 3033 Invalid, 5130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1473 Valid, 3657 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-07 01:47:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657473 states. [2021-12-07 01:47:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657473 to 639715. [2021-12-07 01:47:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639715 states, 639714 states have (on average 1.0695029341236866) internal successors, (684176), 639714 states have internal predecessors, (684176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639715 states to 639715 states and 684176 transitions. [2021-12-07 01:47:53,114 INFO L78 Accepts]: Start accepts. Automaton has 639715 states and 684176 transitions. Word has length 1444 [2021-12-07 01:47:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:47:53,115 INFO L470 AbstractCegarLoop]: Abstraction has 639715 states and 684176 transitions. [2021-12-07 01:47:53,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:47:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 639715 states and 684176 transitions. [2021-12-07 01:47:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1453 [2021-12-07 01:47:53,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:47:53,148 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:47:53,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-07 01:47:53,148 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:47:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:47:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash -536897189, now seen corresponding path program 1 times [2021-12-07 01:47:53,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:47:53,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623204381] [2021-12-07 01:47:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:53,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:47:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2343 backedges. 1543 proven. 603 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-12-07 01:47:53,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:47:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623204381] [2021-12-07 01:47:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623204381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:47:53,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954796652] [2021-12-07 01:47:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:47:53,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:47:53,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:47:53,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:47:53,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:47:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:47:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:47:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:47:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2343 backedges. 1844 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-12-07 01:47:55,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:47:55,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954796652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:47:55,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:47:55,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:47:55,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087428212] [2021-12-07 01:47:55,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:47:55,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:47:55,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:47:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:47:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:47:55,155 INFO L87 Difference]: Start difference. First operand 639715 states and 684176 transitions. Second operand has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:48:04,258 INFO L93 Difference]: Finished difference Result 1396973 states and 1499671 transitions. [2021-12-07 01:48:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:48:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1452 [2021-12-07 01:48:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:48:05,296 INFO L225 Difference]: With dead ends: 1396973 [2021-12-07 01:48:05,296 INFO L226 Difference]: Without dead ends: 758625 [2021-12-07 01:48:05,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1453 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:48:05,435 INFO L933 BasicCegarLoop]: 1287 mSDtfsCounter, 1376 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 1628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 5829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1628 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:48:05,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 1408 Invalid, 5829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1628 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-07 01:48:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758625 states. [2021-12-07 01:48:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758625 to 732521. [2021-12-07 01:48:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732521 states, 732520 states have (on average 1.0706533610003823) internal successors, (784275), 732520 states have internal predecessors, (784275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732521 states to 732521 states and 784275 transitions. [2021-12-07 01:48:13,690 INFO L78 Accepts]: Start accepts. Automaton has 732521 states and 784275 transitions. Word has length 1452 [2021-12-07 01:48:13,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:48:13,691 INFO L470 AbstractCegarLoop]: Abstraction has 732521 states and 784275 transitions. [2021-12-07 01:48:13,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 732521 states and 784275 transitions. [2021-12-07 01:48:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1512 [2021-12-07 01:48:13,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:48:13,725 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:48:13,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:48:13,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:48:13,926 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:48:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:48:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 110291712, now seen corresponding path program 1 times [2021-12-07 01:48:13,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:48:13,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718810008] [2021-12-07 01:48:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:48:13,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:48:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:48:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 1044 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-07 01:48:14,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:48:14,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718810008] [2021-12-07 01:48:14,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718810008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:48:14,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:48:14,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:48:14,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175411887] [2021-12-07 01:48:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:48:14,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:48:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:48:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:48:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:48:14,694 INFO L87 Difference]: Start difference. First operand 732521 states and 784275 transitions. Second operand has 4 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:48:28,948 INFO L93 Difference]: Finished difference Result 1875924 states and 2013432 transitions. [2021-12-07 01:48:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:48:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1511 [2021-12-07 01:48:28,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:48:30,358 INFO L225 Difference]: With dead ends: 1875924 [2021-12-07 01:48:30,358 INFO L226 Difference]: Without dead ends: 1146135 [2021-12-07 01:48:30,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:48:30,580 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 3325 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7629 mSolverCounterSat, 2463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 10092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2463 IncrementalHoareTripleChecker+Valid, 7629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:48:30,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3325 Valid, 1077 Invalid, 10092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2463 Valid, 7629 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-12-07 01:48:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146135 states. [2021-12-07 01:48:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146135 to 1047801. [2021-12-07 01:48:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047801 states, 1047800 states have (on average 1.054308074059935) internal successors, (1104704), 1047800 states have internal predecessors, (1104704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047801 states to 1047801 states and 1104704 transitions. [2021-12-07 01:48:42,659 INFO L78 Accepts]: Start accepts. Automaton has 1047801 states and 1104704 transitions. Word has length 1511 [2021-12-07 01:48:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:48:42,660 INFO L470 AbstractCegarLoop]: Abstraction has 1047801 states and 1104704 transitions. [2021-12-07 01:48:42,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 286.5) internal successors, (1146), 4 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1047801 states and 1104704 transitions. [2021-12-07 01:48:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1847 [2021-12-07 01:48:42,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:48:42,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:48:42,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-07 01:48:42,713 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:48:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:48:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 169046351, now seen corresponding path program 1 times [2021-12-07 01:48:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:48:42,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275954777] [2021-12-07 01:48:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:48:42,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:48:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:48:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 79 proven. 989 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2021-12-07 01:48:43,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:48:43,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275954777] [2021-12-07 01:48:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275954777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:48:43,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517906781] [2021-12-07 01:48:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:48:43,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:48:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:48:43,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:48:43,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_381d32f1-0d92-4b63-bf10-d95eee1cba9a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:48:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:48:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:48:43,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:48:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2021-12-07 01:48:45,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:48:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517906781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:48:45,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:48:45,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:48:45,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309867541] [2021-12-07 01:48:45,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:48:45,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:48:45,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:48:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:48:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:48:45,108 INFO L87 Difference]: Start difference. First operand 1047801 states and 1104704 transitions. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:48:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:48:55,862 INFO L93 Difference]: Finished difference Result 2079341 states and 2191209 transitions. [2021-12-07 01:48:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:48:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1846 [2021-12-07 01:48:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:48:57,114 INFO L225 Difference]: With dead ends: 2079341 [2021-12-07 01:48:57,114 INFO L226 Difference]: Without dead ends: 1032907 [2021-12-07 01:48:57,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1850 GetRequests, 1847 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:48:57,596 INFO L933 BasicCegarLoop]: 2625 mSDtfsCounter, 1489 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 4850 mSolverCounterSat, 770 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2776 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 4850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:48:57,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 2776 Invalid, 5620 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [770 Valid, 4850 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-07 01:48:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032907 states.