./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label19.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_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/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_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label19.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/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_83545bee-9746-4d79-aaa5-10a83990cd73/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 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:23:35,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:23:35,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:23:35,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:23:35,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:23:35,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:23:35,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:23:35,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:23:35,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:23:35,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:23:35,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:23:35,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:23:35,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:23:35,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:23:35,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:23:35,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:23:35,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:23:35,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:23:35,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:23:35,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:23:35,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:23:35,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:23:35,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:23:35,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:23:35,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:23:35,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:23:35,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:23:35,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:23:35,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:23:35,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:23:35,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:23:35,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:23:35,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:23:35,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:23:35,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:23:35,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:23:35,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:23:35,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:23:35,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:23:35,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:23:35,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:23:35,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:23:35,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:23:35,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:23:35,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:23:35,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:23:35,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:23:35,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:23:35,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:23:35,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:23:35,131 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:23:35,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:23:35,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:23:35,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:23:35,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:23:35,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:23:35,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:23:35,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:23:35,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:23:35,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:23:35,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:23:35,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:23:35,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:23:35,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:23:35,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:23:35,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:23:35,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:23:35,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:23:35,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:23:35,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:23:35,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:23:35,136 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_83545bee-9746-4d79-aaa5-10a83990cd73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca [2021-12-06 22:23:35,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:23:35,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:23:35,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:23:35,339 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:23:35,339 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:23:35,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-06 22:23:35,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/data/639ebf004/66ca87451bfe4c8aad4334c2652e395d/FLAG379b87114 [2021-12-06 22:23:36,028 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:23:36,028 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-06 22:23:36,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/data/639ebf004/66ca87451bfe4c8aad4334c2652e395d/FLAG379b87114 [2021-12-06 22:23:36,433 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/data/639ebf004/66ca87451bfe4c8aad4334c2652e395d [2021-12-06 22:23:36,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:23:36,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:23:36,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:23:36,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:23:36,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:23:36,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:23:36" (1/1) ... [2021-12-06 22:23:36,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d29b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:36, skipping insertion in model container [2021-12-06 22:23:36,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:23:36" (1/1) ... [2021-12-06 22:23:36,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:23:36,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:23:36,883 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_83545bee-9746-4d79-aaa5-10a83990cd73/sv-benchmarks/c/eca-rers2012/Problem19_label19.c[3491,3504] [2021-12-06 22:23:37,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:23:37,909 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:23:37,922 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_83545bee-9746-4d79-aaa5-10a83990cd73/sv-benchmarks/c/eca-rers2012/Problem19_label19.c[3491,3504] [2021-12-06 22:23:38,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:23:38,688 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:23:38,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38 WrapperNode [2021-12-06 22:23:38,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:23:38,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:23:38,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:23:38,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:23:38,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:38,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,295 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-06 22:23:39,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:23:39,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:23:39,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:23:39,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:23:39,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:23:39,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:23:39,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:23:39,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:23:39,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (1/1) ... [2021-12-06 22:23:39,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:23:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:39,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:23:39,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:23:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:23:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:23:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:23:39,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:23:39,945 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:23:39,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:23:45,344 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:23:45,369 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:23:45,369 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:23:45,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:23:45 BoogieIcfgContainer [2021-12-06 22:23:45,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:23:45,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:23:45,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:23:45,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:23:45,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:23:36" (1/3) ... [2021-12-06 22:23:45,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebca22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:23:45, skipping insertion in model container [2021-12-06 22:23:45,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:38" (2/3) ... [2021-12-06 22:23:45,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ebca22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:23:45, skipping insertion in model container [2021-12-06 22:23:45,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:23:45" (3/3) ... [2021-12-06 22:23:45,380 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label19.c [2021-12-06 22:23:45,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:23:45,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:23:45,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:23:45,435 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 [2021-12-06 22:23:45,436 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:23:45,476 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) [2021-12-06 22:23:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 22:23:45,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:45,482 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] [2021-12-06 22:23:45,483 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:23:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-06 22:23:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398857042] [2021-12-06 22:23:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:45,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:45,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398857042] [2021-12-06 22:23:45,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398857042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:45,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:45,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:23:45,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378707106] [2021-12-06 22:23:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:45,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:23:45,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:45,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:23:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:23:45,678 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 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:51,121 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-12-06 22:23:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:23:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-06 22:23:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:51,150 INFO L225 Difference]: With dead ends: 4919 [2021-12-06 22:23:51,150 INFO L226 Difference]: Without dead ends: 3107 [2021-12-06 22:23:51,156 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 [2021-12-06 22:23:51,159 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 1529 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 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, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:51,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 22:23:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-12-06 22:23:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-12-06 22:23:51,260 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) [2021-12-06 22:23:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-12-06 22:23:51,270 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 24 [2021-12-06 22:23:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:51,271 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-12-06 22:23:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-12-06 22:23:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 22:23:51,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:51,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:23:51,274 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:23:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1090988298, now seen corresponding path program 1 times [2021-12-06 22:23:51,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349790071] [2021-12-06 22:23:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:51,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:51,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:51,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349790071] [2021-12-06 22:23:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349790071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:51,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:23:51,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30398124] [2021-12-06 22:23:51,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:51,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:23:51,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:23:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:51,431 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:02,636 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-12-06 22:24:02,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:24:02,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-06 22:24:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:02,665 INFO L225 Difference]: With dead ends: 10391 [2021-12-06 22:24:02,665 INFO L226 Difference]: Without dead ends: 7287 [2021-12-06 22:24:02,668 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 [2021-12-06 22:24:02,670 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 4206 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 11121 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4206 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 12527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:02,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4206 Valid, 2105 Invalid, 12527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 11121 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-12-06 22:24:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-06 22:24:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-12-06 22:24:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5213545266067727) internal successors, (11007), 7235 states have internal predecessors, (11007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11007 transitions. [2021-12-06 22:24:02,797 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11007 transitions. Word has length 93 [2021-12-06 22:24:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:02,798 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11007 transitions. [2021-12-06 22:24:02,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11007 transitions. [2021-12-06 22:24:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-06 22:24:02,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:02,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:24:02,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash -366703381, now seen corresponding path program 1 times [2021-12-06 22:24:02,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815711232] [2021-12-06 22:24:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:02,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:02,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815711232] [2021-12-06 22:24:02,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815711232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:02,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:02,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:24:02,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053547860] [2021-12-06 22:24:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:02,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:02,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:24:02,960 INFO L87 Difference]: Start difference. First operand 7236 states and 11007 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:07,671 INFO L93 Difference]: Finished difference Result 15858 states and 25893 transitions. [2021-12-06 22:24:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 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 259 [2021-12-06 22:24:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:07,710 INFO L225 Difference]: With dead ends: 15858 [2021-12-06 22:24:07,710 INFO L226 Difference]: Without dead ends: 9989 [2021-12-06 22:24:07,716 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 [2021-12-06 22:24:07,717 INFO L933 BasicCegarLoop]: 2905 mSDtfsCounter, 1587 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 1906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1906 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:07,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 3095 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1906 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-06 22:24:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-12-06 22:24:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9987. [2021-12-06 22:24:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.426096535149209) internal successors, (14241), 9986 states have internal predecessors, (14241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14241 transitions. [2021-12-06 22:24:07,865 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14241 transitions. Word has length 259 [2021-12-06 22:24:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:07,865 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14241 transitions. [2021-12-06 22:24:07,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14241 transitions. [2021-12-06 22:24:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-06 22:24:07,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:07,871 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:24:07,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:24:07,871 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -509510883, now seen corresponding path program 1 times [2021-12-06 22:24:07,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159696292] [2021-12-06 22:24:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:07,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:08,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159696292] [2021-12-06 22:24:08,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159696292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:08,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:08,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:24:08,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5007003] [2021-12-06 22:24:08,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:24:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:24:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:24:08,058 INFO L87 Difference]: Start difference. First operand 9987 states and 14241 transitions. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:14,397 INFO L93 Difference]: Finished difference Result 18638 states and 27134 transitions. [2021-12-06 22:24:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:24:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 326 [2021-12-06 22:24:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:14,428 INFO L225 Difference]: With dead ends: 18638 [2021-12-06 22:24:14,428 INFO L226 Difference]: Without dead ends: 9987 [2021-12-06 22:24:14,434 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 [2021-12-06 22:24:14,435 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7313 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:14,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2106 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7313 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 22:24:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2021-12-06 22:24:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9987. [2021-12-06 22:24:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4251952733827358) internal successors, (14232), 9986 states have internal predecessors, (14232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14232 transitions. [2021-12-06 22:24:14,570 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14232 transitions. Word has length 326 [2021-12-06 22:24:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:14,571 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14232 transitions. [2021-12-06 22:24:14,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14232 transitions. [2021-12-06 22:24:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-12-06 22:24:14,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:14,580 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:24:14,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:24:14,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash -893427766, now seen corresponding path program 1 times [2021-12-06 22:24:14,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:14,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955916150] [2021-12-06 22:24:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:14,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 22:24:14,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:14,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955916150] [2021-12-06 22:24:14,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955916150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:14,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:14,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:24:14,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786014388] [2021-12-06 22:24:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:24:14,814 INFO L87 Difference]: Start difference. First operand 9987 states and 14232 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:19,425 INFO L93 Difference]: Finished difference Result 21345 states and 30939 transitions. [2021-12-06 22:24:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 0 states have call successors, (0), 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 587 [2021-12-06 22:24:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:19,445 INFO L225 Difference]: With dead ends: 21345 [2021-12-06 22:24:19,445 INFO L226 Difference]: Without dead ends: 12725 [2021-12-06 22:24:19,451 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 [2021-12-06 22:24:19,451 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1395 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:19,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 754 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-06 22:24:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12725 states. [2021-12-06 22:24:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12725 to 12721. [2021-12-06 22:24:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 1.3437106918238995) internal successors, (17092), 12720 states have internal predecessors, (17092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 17092 transitions. [2021-12-06 22:24:19,588 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 17092 transitions. Word has length 587 [2021-12-06 22:24:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:19,589 INFO L470 AbstractCegarLoop]: Abstraction has 12721 states and 17092 transitions. [2021-12-06 22:24:19,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 17092 transitions. [2021-12-06 22:24:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2021-12-06 22:24:19,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:19,601 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:19,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:24:19,601 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:19,602 INFO L85 PathProgramCache]: Analyzing trace with hash -848627556, now seen corresponding path program 1 times [2021-12-06 22:24:19,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:19,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771690914] [2021-12-06 22:24:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:19,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 22:24:19,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771690914] [2021-12-06 22:24:19,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771690914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:19,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:19,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:24:19,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805176877] [2021-12-06 22:24:19,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:19,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:19,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:24:19,814 INFO L87 Difference]: Start difference. First operand 12721 states and 17092 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:26,107 INFO L93 Difference]: Finished difference Result 35169 states and 48194 transitions. [2021-12-06 22:24:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:26,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 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 646 [2021-12-06 22:24:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:26,131 INFO L225 Difference]: With dead ends: 35169 [2021-12-06 22:24:26,132 INFO L226 Difference]: Without dead ends: 23815 [2021-12-06 22:24:26,140 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 [2021-12-06 22:24:26,141 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:26,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 980 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 22:24:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23815 states. [2021-12-06 22:24:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23815 to 23813. [2021-12-06 22:24:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23813 states, 23812 states have (on average 1.3270199899210482) internal successors, (31599), 23812 states have internal predecessors, (31599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23813 states to 23813 states and 31599 transitions. [2021-12-06 22:24:26,382 INFO L78 Accepts]: Start accepts. Automaton has 23813 states and 31599 transitions. Word has length 646 [2021-12-06 22:24:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:26,383 INFO L470 AbstractCegarLoop]: Abstraction has 23813 states and 31599 transitions. [2021-12-06 22:24:26,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23813 states and 31599 transitions. [2021-12-06 22:24:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2021-12-06 22:24:26,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:26,390 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:26,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:24:26,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash 558703373, now seen corresponding path program 1 times [2021-12-06 22:24:26,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:26,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358717965] [2021-12-06 22:24:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:26,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 172 proven. 90 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:26,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358717965] [2021-12-06 22:24:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358717965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:26,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459389970] [2021-12-06 22:24:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:26,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:26,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:26,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:24:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:24:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-06 22:24:27,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:24:27,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459389970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:27,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:24:27,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 22:24:27,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454618318] [2021-12-06 22:24:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:27,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:27,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:27,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:24:27,445 INFO L87 Difference]: Start difference. First operand 23813 states and 31599 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:33,022 INFO L93 Difference]: Finished difference Result 68132 states and 91312 transitions. [2021-12-06 22:24:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 660 [2021-12-06 22:24:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:33,067 INFO L225 Difference]: With dead ends: 68132 [2021-12-06 22:24:33,067 INFO L226 Difference]: Without dead ends: 45686 [2021-12-06 22:24:33,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:24:33,090 INFO L933 BasicCegarLoop]: 1955 mSDtfsCounter, 1654 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 6008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:33,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 2060 Invalid, 6008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-06 22:24:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45686 states. [2021-12-06 22:24:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45686 to 45663. [2021-12-06 22:24:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45663 states, 45662 states have (on average 1.3033813674390085) internal successors, (59515), 45662 states have internal predecessors, (59515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45663 states to 45663 states and 59515 transitions. [2021-12-06 22:24:33,526 INFO L78 Accepts]: Start accepts. Automaton has 45663 states and 59515 transitions. Word has length 660 [2021-12-06 22:24:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:33,527 INFO L470 AbstractCegarLoop]: Abstraction has 45663 states and 59515 transitions. [2021-12-06 22:24:33,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 45663 states and 59515 transitions. [2021-12-06 22:24:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-06 22:24:33,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:33,564 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:33,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:24:33,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 22:24:33,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash 323154289, now seen corresponding path program 1 times [2021-12-06 22:24:33,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800348605] [2021-12-06 22:24:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:33,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 22:24:33,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800348605] [2021-12-06 22:24:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800348605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:33,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:33,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:24:33,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795680042] [2021-12-06 22:24:33,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:33,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:33,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:24:33,993 INFO L87 Difference]: Start difference. First operand 45663 states and 59515 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:39,377 INFO L93 Difference]: Finished difference Result 131113 states and 171481 transitions. [2021-12-06 22:24:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:39,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 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 667 [2021-12-06 22:24:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:39,457 INFO L225 Difference]: With dead ends: 131113 [2021-12-06 22:24:39,457 INFO L226 Difference]: Without dead ends: 86817 [2021-12-06 22:24:39,479 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 [2021-12-06 22:24:39,479 INFO L933 BasicCegarLoop]: 1479 mSDtfsCounter, 1353 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 4228 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 5652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 1743 Invalid, 5652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 4228 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 22:24:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86817 states. [2021-12-06 22:24:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86817 to 78608. [2021-12-06 22:24:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78608 states, 78607 states have (on average 1.211953133944814) internal successors, (95268), 78607 states have internal predecessors, (95268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78608 states to 78608 states and 95268 transitions. [2021-12-06 22:24:40,289 INFO L78 Accepts]: Start accepts. Automaton has 78608 states and 95268 transitions. Word has length 667 [2021-12-06 22:24:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:40,290 INFO L470 AbstractCegarLoop]: Abstraction has 78608 states and 95268 transitions. [2021-12-06 22:24:40,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 78608 states and 95268 transitions. [2021-12-06 22:24:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-12-06 22:24:40,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:40,298 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 22:24:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:24:40,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1779767841, now seen corresponding path program 1 times [2021-12-06 22:24:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:40,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098959180] [2021-12-06 22:24:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:40,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 217 proven. 366 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 22:24:40,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098959180] [2021-12-06 22:24:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098959180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689212005] [2021-12-06 22:24:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:40,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:40,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:40,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:24:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:24:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-06 22:24:41,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:24:41,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689212005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:41,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:24:41,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-06 22:24:41,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328403281] [2021-12-06 22:24:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:41,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:24:41,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:41,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:24:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:24:41,462 INFO L87 Difference]: Start difference. First operand 78608 states and 95268 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:47,535 INFO L93 Difference]: Finished difference Result 176335 states and 217281 transitions. [2021-12-06 22:24:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:24:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 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 884 [2021-12-06 22:24:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:47,678 INFO L225 Difference]: With dead ends: 176335 [2021-12-06 22:24:47,678 INFO L226 Difference]: Without dead ends: 99094 [2021-12-06 22:24:47,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:24:47,704 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 1579 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 5877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 969 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:47,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 1446 Invalid, 5877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [969 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 22:24:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99094 states. [2021-12-06 22:24:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99094 to 94987. [2021-12-06 22:24:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94987 states, 94986 states have (on average 1.2193060029899143) internal successors, (115817), 94986 states have internal predecessors, (115817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94987 states to 94987 states and 115817 transitions. [2021-12-06 22:24:48,635 INFO L78 Accepts]: Start accepts. Automaton has 94987 states and 115817 transitions. Word has length 884 [2021-12-06 22:24:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 94987 states and 115817 transitions. [2021-12-06 22:24:48,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 94987 states and 115817 transitions. [2021-12-06 22:24:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 985 [2021-12-06 22:24:48,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:48,654 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:24:48,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:24:48,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:48,856 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:24:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2085663085, now seen corresponding path program 1 times [2021-12-06 22:24:48,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944177177] [2021-12-06 22:24:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:48,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 670 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:24:49,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:49,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944177177] [2021-12-06 22:24:49,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944177177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:49,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:49,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:24:49,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103241889] [2021-12-06 22:24:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:49,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:24:49,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:24:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:24:49,247 INFO L87 Difference]: Start difference. First operand 94987 states and 115817 transitions. Second operand has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:59,759 INFO L93 Difference]: Finished difference Result 311624 states and 382758 transitions. [2021-12-06 22:24:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:24:59,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 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 984 [2021-12-06 22:24:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:00,002 INFO L225 Difference]: With dead ends: 311624 [2021-12-06 22:25:00,002 INFO L226 Difference]: Without dead ends: 218004 [2021-12-06 22:25:00,042 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 [2021-12-06 22:25:00,043 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 3254 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 9083 mSolverCounterSat, 2758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3254 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 11841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2758 IncrementalHoareTripleChecker+Valid, 9083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:00,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3254 Valid, 1080 Invalid, 11841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2758 Valid, 9083 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-12-06 22:25:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218004 states. [2021-12-06 22:25:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218004 to 213812. [2021-12-06 22:25:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213812 states, 213811 states have (on average 1.1809308220811838) internal successors, (252496), 213811 states have internal predecessors, (252496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213812 states to 213812 states and 252496 transitions. [2021-12-06 22:25:02,593 INFO L78 Accepts]: Start accepts. Automaton has 213812 states and 252496 transitions. Word has length 984 [2021-12-06 22:25:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:02,594 INFO L470 AbstractCegarLoop]: Abstraction has 213812 states and 252496 transitions. [2021-12-06 22:25:02,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.75) internal successors, (755), 4 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 213812 states and 252496 transitions. [2021-12-06 22:25:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2021-12-06 22:25:02,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:02,614 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:25:02,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:25:02,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:25:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:02,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1176801321, now seen corresponding path program 1 times [2021-12-06 22:25:02,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601260365] [2021-12-06 22:25:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:02,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 586 proven. 313 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:25:03,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601260365] [2021-12-06 22:25:03,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601260365] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:03,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63486018] [2021-12-06 22:25:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:03,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:03,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:03,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:03,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:25:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:03,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:25:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 509 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2021-12-06 22:25:04,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:25:04,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63486018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:25:04,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:25:04,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 22:25:04,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483565851] [2021-12-06 22:25:04,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:25:04,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:25:04,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:25:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:04,209 INFO L87 Difference]: Start difference. First operand 213812 states and 252496 transitions. Second operand has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 2 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:10,525 INFO L93 Difference]: Finished difference Result 517858 states and 611506 transitions. [2021-12-06 22:25:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:25:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 2 states have internal predecessors, (713), 0 states have call successors, (0), 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 993 [2021-12-06 22:25:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:10,913 INFO L225 Difference]: With dead ends: 517858 [2021-12-06 22:25:10,913 INFO L226 Difference]: Without dead ends: 305413 [2021-12-06 22:25:11,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 994 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:11,016 INFO L933 BasicCegarLoop]: 1105 mSDtfsCounter, 1150 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 4157 mSolverCounterSat, 1829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 5986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1829 IncrementalHoareTripleChecker+Valid, 4157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:11,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1233 Invalid, 5986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1829 Valid, 4157 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 22:25:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305413 states. [2021-12-06 22:25:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305413 to 302555. [2021-12-06 22:25:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302555 states, 302554 states have (on average 1.1422522921528058) internal successors, (345593), 302554 states have internal predecessors, (345593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302555 states to 302555 states and 345593 transitions. [2021-12-06 22:25:14,473 INFO L78 Accepts]: Start accepts. Automaton has 302555 states and 345593 transitions. Word has length 993 [2021-12-06 22:25:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:14,473 INFO L470 AbstractCegarLoop]: Abstraction has 302555 states and 345593 transitions. [2021-12-06 22:25:14,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.66666666666666) internal successors, (713), 2 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 302555 states and 345593 transitions. [2021-12-06 22:25:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2021-12-06 22:25:14,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:14,484 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:25:14,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:25:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:14,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:25:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1267490297, now seen corresponding path program 1 times [2021-12-06 22:25:14,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:14,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042915368] [2021-12-06 22:25:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:14,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 586 proven. 313 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:25:15,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:15,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042915368] [2021-12-06 22:25:15,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042915368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:15,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698677629] [2021-12-06 22:25:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:15,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:15,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:15,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:15,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:25:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:25:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-06 22:25:16,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:25:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698677629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:25:16,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:25:16,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 22:25:16,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018896366] [2021-12-06 22:25:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:25:16,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:25:16,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:25:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:16,028 INFO L87 Difference]: Start difference. First operand 302555 states and 345593 transitions. Second operand has 3 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:22,528 INFO L93 Difference]: Finished difference Result 607955 states and 694138 transitions. [2021-12-06 22:25:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:25:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 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 1002 [2021-12-06 22:25:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:22,924 INFO L225 Difference]: With dead ends: 607955 [2021-12-06 22:25:22,924 INFO L226 Difference]: Without dead ends: 308132 [2021-12-06 22:25:23,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:23,184 INFO L933 BasicCegarLoop]: 3054 mSDtfsCounter, 1300 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 4165 mSolverCounterSat, 1073 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 5238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1073 IncrementalHoareTripleChecker+Valid, 4165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 3223 Invalid, 5238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1073 Valid, 4165 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-06 22:25:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308132 states. [2021-12-06 22:25:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308132 to 301200. [2021-12-06 22:25:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301200 states, 301199 states have (on average 1.1291073343536997) internal successors, (340086), 301199 states have internal predecessors, (340086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301200 states to 301200 states and 340086 transitions. [2021-12-06 22:25:26,636 INFO L78 Accepts]: Start accepts. Automaton has 301200 states and 340086 transitions. Word has length 1002 [2021-12-06 22:25:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:26,637 INFO L470 AbstractCegarLoop]: Abstraction has 301200 states and 340086 transitions. [2021-12-06 22:25:26,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 301200 states and 340086 transitions. [2021-12-06 22:25:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2021-12-06 22:25:26,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:26,654 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:25:26,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 22:25:26,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:25:26,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:25:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:26,858 INFO L85 PathProgramCache]: Analyzing trace with hash 663238540, now seen corresponding path program 1 times [2021-12-06 22:25:26,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:26,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008401885] [2021-12-06 22:25:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:26,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 619 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-06 22:25:27,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:27,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008401885] [2021-12-06 22:25:27,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008401885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:25:27,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:25:27,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:25:27,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323220443] [2021-12-06 22:25:27,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:25:27,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:25:27,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:25:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:25:27,249 INFO L87 Difference]: Start difference. First operand 301200 states and 340086 transitions. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:39,097 INFO L93 Difference]: Finished difference Result 905450 states and 1037291 transitions. [2021-12-06 22:25:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:25:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 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 1060 [2021-12-06 22:25:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:39,940 INFO L225 Difference]: With dead ends: 905450 [2021-12-06 22:25:39,940 INFO L226 Difference]: Without dead ends: 606982 [2021-12-06 22:25:40,037 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 [2021-12-06 22:25:40,038 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 4896 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 6087 mSolverCounterSat, 4091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4896 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 10178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4091 IncrementalHoareTripleChecker+Valid, 6087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:40,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4896 Valid, 1065 Invalid, 10178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4091 Valid, 6087 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2021-12-06 22:25:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606982 states. [2021-12-06 22:25:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606982 to 605594. [2021-12-06 22:25:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605594 states, 605593 states have (on average 1.115019493290048) internal successors, (675248), 605593 states have internal predecessors, (675248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605594 states to 605594 states and 675248 transitions. [2021-12-06 22:25:46,467 INFO L78 Accepts]: Start accepts. Automaton has 605594 states and 675248 transitions. Word has length 1060 [2021-12-06 22:25:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 605594 states and 675248 transitions. [2021-12-06 22:25:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 605594 states and 675248 transitions. [2021-12-06 22:25:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2021-12-06 22:25:46,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:46,493 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:46,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:25:46,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:25:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1834408547, now seen corresponding path program 1 times [2021-12-06 22:25:46,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:46,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784325748] [2021-12-06 22:25:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:46,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 395 proven. 485 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:25:47,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784325748] [2021-12-06 22:25:47,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784325748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009297502] [2021-12-06 22:25:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:47,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:47,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:47,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:25:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:25:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2021-12-06 22:25:48,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:25:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009297502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:25:48,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:25:48,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:25:48,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395814253] [2021-12-06 22:25:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:25:48,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:25:48,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:25:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:48,516 INFO L87 Difference]: Start difference. First operand 605594 states and 675248 transitions. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:58,194 INFO L93 Difference]: Finished difference Result 1424175 states and 1597324 transitions. [2021-12-06 22:25:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:25:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 1395 [2021-12-06 22:25:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:59,515 INFO L225 Difference]: With dead ends: 1424175 [2021-12-06 22:25:59,515 INFO L226 Difference]: Without dead ends: 821313 [2021-12-06 22:25:59,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:25:59,727 INFO L933 BasicCegarLoop]: 2431 mSDtfsCounter, 1552 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 5074 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 2652 SdHoareTripleChecker+Invalid, 5836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 5074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:59,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 2652 Invalid, 5836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 5074 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-06 22:26:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821313 states. [2021-12-06 22:26:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821313 to 821298. [2021-12-06 22:26:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821298 states, 821297 states have (on average 1.1085782609701484) internal successors, (910472), 821297 states have internal predecessors, (910472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821298 states to 821298 states and 910472 transitions. [2021-12-06 22:26:09,330 INFO L78 Accepts]: Start accepts. Automaton has 821298 states and 910472 transitions. Word has length 1395 [2021-12-06 22:26:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:09,331 INFO L470 AbstractCegarLoop]: Abstraction has 821298 states and 910472 transitions. [2021-12-06 22:26:09,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 821298 states and 910472 transitions. [2021-12-06 22:26:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1506 [2021-12-06 22:26:09,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:09,365 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:26:09,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:26:09,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:26:09,568 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash -616892176, now seen corresponding path program 1 times [2021-12-06 22:26:09,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:09,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400672050] [2021-12-06 22:26:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:09,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 798 proven. 485 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-06 22:26:10,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400672050] [2021-12-06 22:26:10,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400672050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184665139] [2021-12-06 22:26:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:10,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:10,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:10,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:26:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2021-12-06 22:26:11,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:26:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184665139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:11,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:26:11,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:26:11,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073515841] [2021-12-06 22:26:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:11,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:26:11,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:26:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:11,578 INFO L87 Difference]: Start difference. First operand 821298 states and 910472 transitions. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:22,633 INFO L93 Difference]: Finished difference Result 1712203 states and 1897478 transitions. [2021-12-06 22:26:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:26:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 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 1505 [2021-12-06 22:26:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:24,006 INFO L225 Difference]: With dead ends: 1712203 [2021-12-06 22:26:24,006 INFO L226 Difference]: Without dead ends: 893637 [2021-12-06 22:26:24,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1504 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:24,199 INFO L933 BasicCegarLoop]: 2928 mSDtfsCounter, 1399 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4583 mSolverCounterSat, 952 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 5535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 4583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:24,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 3177 Invalid, 5535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [952 Valid, 4583 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-12-06 22:26:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893637 states. [2021-12-06 22:26:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893637 to 873158. [2021-12-06 22:26:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873158 states, 873157 states have (on average 1.104131330333491) internal successors, (964080), 873157 states have internal predecessors, (964080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873158 states to 873158 states and 964080 transitions. [2021-12-06 22:26:34,212 INFO L78 Accepts]: Start accepts. Automaton has 873158 states and 964080 transitions. Word has length 1505 [2021-12-06 22:26:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:34,213 INFO L470 AbstractCegarLoop]: Abstraction has 873158 states and 964080 transitions. [2021-12-06 22:26:34,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 873158 states and 964080 transitions. [2021-12-06 22:26:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1742 [2021-12-06 22:26:34,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:34,311 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:34,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:26:34,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:26:34,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 529496287, now seen corresponding path program 1 times [2021-12-06 22:26:34,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:34,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486450362] [2021-12-06 22:26:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:34,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1264 proven. 485 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2021-12-06 22:26:35,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:35,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486450362] [2021-12-06 22:26:35,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486450362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:35,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098706458] [2021-12-06 22:26:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:35,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:35,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:35,547 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:35,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:26:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 1219 proven. 0 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2021-12-06 22:26:37,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:26:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098706458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:37,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:26:37,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:26:37,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102608627] [2021-12-06 22:26:37,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:37,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:26:37,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:26:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:37,006 INFO L87 Difference]: Start difference. First operand 873158 states and 964080 transitions. Second operand has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:47,843 INFO L93 Difference]: Finished difference Result 1843216 states and 2034945 transitions. [2021-12-06 22:26:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:26:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 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 1741 [2021-12-06 22:26:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:49,291 INFO L225 Difference]: With dead ends: 1843216 [2021-12-06 22:26:49,291 INFO L226 Difference]: Without dead ends: 972790 [2021-12-06 22:26:49,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1740 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:49,884 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 2223 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4022 mSolverCounterSat, 1440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 5462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1440 IncrementalHoareTripleChecker+Valid, 4022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:49,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 837 Invalid, 5462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1440 Valid, 4022 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 22:26:50,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972790 states. [2021-12-06 22:26:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972790 to 572617. [2021-12-06 22:26:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572617 states, 572616 states have (on average 1.0942848261312992) internal successors, (626605), 572616 states have internal predecessors, (626605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572617 states to 572617 states and 626605 transitions. [2021-12-06 22:26:58,166 INFO L78 Accepts]: Start accepts. Automaton has 572617 states and 626605 transitions. Word has length 1741 [2021-12-06 22:26:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:58,167 INFO L470 AbstractCegarLoop]: Abstraction has 572617 states and 626605 transitions. [2021-12-06 22:26:58,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 572617 states and 626605 transitions. [2021-12-06 22:26:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1885 [2021-12-06 22:26:58,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:58,506 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:58,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:26:58,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:26:58,723 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1526696204, now seen corresponding path program 1 times [2021-12-06 22:26:58,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:58,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822293556] [2021-12-06 22:26:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:58,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2895 backedges. 1546 proven. 485 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2021-12-06 22:26:59,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822293556] [2021-12-06 22:26:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822293556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056312302] [2021-12-06 22:26:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:59,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:59,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:59,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:26:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:26:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2895 backedges. 1732 proven. 0 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2021-12-06 22:27:01,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:27:01,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056312302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:01,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:27:01,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:27:01,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442150322] [2021-12-06 22:27:01,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:01,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:01,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:01,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:01,064 INFO L87 Difference]: Start difference. First operand 572617 states and 626605 transitions. Second operand has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:09,357 INFO L93 Difference]: Finished difference Result 1139776 states and 1247582 transitions. [2021-12-06 22:27:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:27:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 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 1884 [2021-12-06 22:27:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:10,073 INFO L225 Difference]: With dead ends: 1139776 [2021-12-06 22:27:10,073 INFO L226 Difference]: Without dead ends: 569891 [2021-12-06 22:27:10,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1889 GetRequests, 1883 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:27:10,240 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1631 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:10,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 715 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 22:27:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569891 states. [2021-12-06 22:27:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569891 to 569885. [2021-12-06 22:27:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569885 states, 569884 states have (on average 1.0874265640024987) internal successors, (619707), 569884 states have internal predecessors, (619707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569885 states to 569885 states and 619707 transitions. [2021-12-06 22:27:16,751 INFO L78 Accepts]: Start accepts. Automaton has 569885 states and 619707 transitions. Word has length 1884 [2021-12-06 22:27:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:16,752 INFO L470 AbstractCegarLoop]: Abstraction has 569885 states and 619707 transitions. [2021-12-06 22:27:16,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 569885 states and 619707 transitions. [2021-12-06 22:27:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2021-12-06 22:27:16,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:16,866 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:16,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 22:27:17,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:27:17,068 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1158405346, now seen corresponding path program 1 times [2021-12-06 22:27:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699422678] [2021-12-06 22:27:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:17,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2036 backedges. 1223 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-12-06 22:27:18,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:18,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699422678] [2021-12-06 22:27:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699422678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:18,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:18,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:27:18,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572856852] [2021-12-06 22:27:18,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:27:18,099 INFO L87 Difference]: Start difference. First operand 569885 states and 619707 transitions. Second operand has 3 states, 3 states have (on average 420.3333333333333) internal successors, (1261), 2 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:26,142 INFO L93 Difference]: Finished difference Result 1156157 states and 1256399 transitions. [2021-12-06 22:27:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:27:26,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 420.3333333333333) internal successors, (1261), 2 states have internal predecessors, (1261), 0 states have call successors, (0), 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 2049 [2021-12-06 22:27:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:26,873 INFO L225 Difference]: With dead ends: 1156157 [2021-12-06 22:27:26,873 INFO L226 Difference]: Without dead ends: 586274 [2021-12-06 22:27:27,042 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 [2021-12-06 22:27:27,043 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 524 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4374 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 4379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:27,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1798 Invalid, 4379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4374 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-06 22:27:27,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586274 states. [2021-12-06 22:27:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586274 to 586271. [2021-12-06 22:27:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586271 states, 586270 states have (on average 1.0852593514933393) internal successors, (636255), 586270 states have internal predecessors, (636255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586271 states to 586271 states and 636255 transitions. [2021-12-06 22:27:33,745 INFO L78 Accepts]: Start accepts. Automaton has 586271 states and 636255 transitions. Word has length 2049 [2021-12-06 22:27:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 586271 states and 636255 transitions. [2021-12-06 22:27:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 420.3333333333333) internal successors, (1261), 2 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 586271 states and 636255 transitions. [2021-12-06 22:27:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2356 [2021-12-06 22:27:33,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:33,904 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:33,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:27:33,905 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1962114845, now seen corresponding path program 1 times [2021-12-06 22:27:33,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:33,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096584443] [2021-12-06 22:27:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:33,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 1951 proven. 1015 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2021-12-06 22:27:35,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:35,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096584443] [2021-12-06 22:27:35,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096584443] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:35,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994304807] [2021-12-06 22:27:35,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:35,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:35,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:35,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:27:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:27:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 1285 proven. 0 refuted. 0 times theorem prover too weak. 2103 trivial. 0 not checked. [2021-12-06 22:27:36,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:27:36,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994304807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:36,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:27:36,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-06 22:27:36,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862683913] [2021-12-06 22:27:36,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:36,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:36,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:36,960 INFO L87 Difference]: Start difference. First operand 586271 states and 636255 transitions. Second operand has 3 states, 3 states have (on average 420.6666666666667) internal successors, (1262), 3 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:46,458 INFO L93 Difference]: Finished difference Result 1290012 states and 1402898 transitions. [2021-12-06 22:27:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:27:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 420.6666666666667) internal successors, (1262), 3 states have internal predecessors, (1262), 0 states have call successors, (0), 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 2355 [2021-12-06 22:27:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:47,292 INFO L225 Difference]: With dead ends: 1290012 [2021-12-06 22:27:47,292 INFO L226 Difference]: Without dead ends: 706473 [2021-12-06 22:27:47,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2360 GetRequests, 2355 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:47,439 INFO L933 BasicCegarLoop]: 2787 mSDtfsCounter, 1187 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4757 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 5664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 4757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:47,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 2955 Invalid, 5664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 4757 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-12-06 22:27:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706473 states. [2021-12-06 22:27:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706473 to 702292. [2021-12-06 22:27:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702292 states, 702291 states have (on average 1.0781826906510263) internal successors, (757198), 702291 states have internal predecessors, (757198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702292 states to 702292 states and 757198 transitions. [2021-12-06 22:27:55,379 INFO L78 Accepts]: Start accepts. Automaton has 702292 states and 757198 transitions. Word has length 2355 [2021-12-06 22:27:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:55,380 INFO L470 AbstractCegarLoop]: Abstraction has 702292 states and 757198 transitions. [2021-12-06 22:27:55,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 420.6666666666667) internal successors, (1262), 3 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 702292 states and 757198 transitions. [2021-12-06 22:27:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2554 [2021-12-06 22:27:55,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:55,861 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:55,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:27:56,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83545bee-9746-4d79-aaa5-10a83990cd73/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:56,063 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2089213834, now seen corresponding path program 1 times [2021-12-06 22:27:56,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197229467] [2021-12-06 22:27:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:56,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2908 backedges. 2491 proven. 0 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-12-06 22:27:57,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:57,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197229467] [2021-12-06 22:27:57,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197229467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:57,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:57,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:27:57,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801123107] [2021-12-06 22:27:57,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:27:57,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:27:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:27:57,110 INFO L87 Difference]: Start difference. First operand 702292 states and 757198 transitions. Second operand has 3 states, 3 states have (on average 720.3333333333334) internal successors, (2161), 3 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:28:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:28:05,644 INFO L93 Difference]: Finished difference Result 1381444 states and 1490633 transitions. [2021-12-06 22:28:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:28:05,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 720.3333333333334) internal successors, (2161), 3 states have internal predecessors, (2161), 0 states have call successors, (0), 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 2553 [2021-12-06 22:28:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted.